Improved value maximizer
parent
f9f28a54d7
commit
5f7696f865
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@ -1,300 +1,51 @@
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use std::{
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use std::{iter, num::NonZeroU8};
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fmt::{Debug, Display},
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iter,
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num::NonZeroU8,
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thread,
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};
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use anyhow::Result;
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use anyhow::Result;
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use itertools::Itertools;
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use itertools::Itertools;
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use rayon::iter::{ParallelBridge, ParallelIterator};
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use super::{MaximizerAgent, MinimizerAgent, RandomAgent};
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use super::{
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util::{fill_partials, TreeCoords},
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MaximizerAgent, MinimizerAgent, RandomAgent,
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};
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use crate::{
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use crate::{
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agents::util::{find_partials, free_chars},
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board::{Board, PlayerAction, TreeElement},
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board::{Board, PlayerAction, TreeElement},
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util::Symb,
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util::Symb,
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};
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};
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pub struct MinMaxTree {}
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pub struct MinMaxTree {}
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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fn find_best_numbers_v1<'a, F>(
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enum TreeDir {
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Right,
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Left,
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This,
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}
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#[derive(Clone, Copy)]
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struct TreeCoords {
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len: usize,
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coords: [TreeDir; 4],
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inversion: [bool; 4],
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}
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impl Display for TreeCoords {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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if self.get_inversion() {
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write!(f, "-")?
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} else {
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write!(f, "+")?
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}
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for c in self.coords {
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match c {
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TreeDir::Left => write!(f, "L")?,
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TreeDir::Right => write!(f, "R")?,
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TreeDir::This => break,
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}
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}
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Ok(())
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}
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}
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impl Debug for TreeCoords {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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Display::fmt(self, f)
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}
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}
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#[allow(dead_code)]
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impl TreeCoords {
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pub fn new() -> Self {
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Self {
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len: 0,
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coords: [TreeDir::This; 4],
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inversion: [false; 4],
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}
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}
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pub fn push(&mut self, dir: TreeDir, invert: bool) {
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if self.len == 4 || dir == TreeDir::This {
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return;
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}
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self.coords[self.len] = dir;
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self.inversion[self.len] = invert;
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self.len += 1;
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}
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pub fn pop(&mut self) -> Option<(TreeDir, bool)> {
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if self.len == 0 {
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return None;
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}
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self.len -= 1;
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let dir = self.coords[self.len];
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let inv = self.inversion[self.len];
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self.coords[self.len] = TreeDir::This;
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self.inversion[self.len] = false;
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Some((dir, inv))
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}
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pub fn get_inversion(&self) -> bool {
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if self.len == 0 {
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false
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} else {
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self.inversion[self.len - 1]
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}
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}
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pub fn get_from<'a>(&self, mut tree: &'a TreeElement) -> Option<&'a TreeElement> {
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for i in 0..self.len {
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match &self.coords[i] {
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TreeDir::Left => {
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if let Some(t) = tree.left() {
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tree = t
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} else {
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return None;
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}
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}
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TreeDir::Right => {
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if let Some(t) = tree.right() {
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tree = t
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} else {
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return None;
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}
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}
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TreeDir::This => return Some(tree),
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}
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}
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Some(tree)
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}
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pub fn get_from_mut<'a>(&self, mut tree: &'a mut TreeElement) -> Option<&'a mut TreeElement> {
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for i in 0..self.len {
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match &self.coords[i] {
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TreeDir::Left => {
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if let Some(t) = tree.left_mut() {
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tree = t
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} else {
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return None;
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}
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}
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TreeDir::Right => {
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if let Some(t) = tree.right_mut() {
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tree = t
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} else {
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return None;
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}
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}
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TreeDir::This => return Some(tree),
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}
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}
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Some(tree)
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}
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}
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/// Count the number of free spaces in partials we want to minimize
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fn count_min_slots(tree: &TreeElement, partials: &[TreeCoords]) -> usize {
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partials
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.iter()
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.filter(|x| x.get_inversion())
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.map(|x| match x.get_from(tree) {
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Some(TreeElement::Partial(s)) => s.chars().filter(|x| *x == '_').count(),
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_ => unreachable!(),
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})
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.sum()
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}
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/// Count the number of free spaces in partials we want to maximize
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fn count_max_slots(tree: &TreeElement, partials: &[TreeCoords]) -> usize {
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partials
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.iter()
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.filter(|x| !x.get_inversion())
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.map(|x| match x.get_from(tree) {
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Some(TreeElement::Partial(s)) => s.chars().filter(|x| *x == '_').count(),
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_ => unreachable!(),
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})
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.sum()
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}
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/// Find the coordinates of all partials in the given tree
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fn find_partials(tree: &TreeElement) -> Vec<TreeCoords> {
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let mut partials = Vec::new();
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let mut current_coords = TreeCoords::new();
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loop {
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let t = current_coords.get_from(tree).unwrap();
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match t {
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TreeElement::Number(_) | TreeElement::Partial(_) => {
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if let TreeElement::Partial(_) = t {
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partials.push(current_coords);
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}
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loop {
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match current_coords.pop() {
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Some((TreeDir::Left, _)) => {
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current_coords.push(
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TreeDir::Right,
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match current_coords.get_from(tree) {
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Some(TreeElement::Add { .. }) => current_coords.get_inversion(),
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Some(TreeElement::Mul { .. }) => current_coords.get_inversion(),
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Some(TreeElement::Sub { .. }) => {
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!current_coords.get_inversion()
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}
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Some(TreeElement::Div { .. }) => {
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!current_coords.get_inversion()
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}
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_ => unreachable!(),
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},
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);
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break;
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}
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Some((TreeDir::Right, _)) => {}
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Some((TreeDir::This, _)) => unreachable!(),
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None => return partials,
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}
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}
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}
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TreeElement::Div { .. }
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| TreeElement::Mul { .. }
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| TreeElement::Sub { .. }
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| TreeElement::Add { .. } => current_coords.push(TreeDir::Left, current_coords.get_inversion()),
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TreeElement::Neg { .. } => {
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current_coords.push(TreeDir::Right, !current_coords.get_inversion())
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}
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}
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}
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}
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fn fill_maxs(
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tree: &TreeElement,
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tree: &TreeElement,
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partials: &[TreeCoords],
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partials: &[TreeCoords],
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mut numbers: impl Iterator<Item = Symb>,
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numbers: impl Iterator<Item = &'a Symb>,
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) -> TreeElement {
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minimize: bool,
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let mut tmp_tree = tree.clone();
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for p in partials.iter().filter(|x| !x.get_inversion()) {
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let x = p.get_from_mut(&mut tmp_tree).unwrap();
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let x_str = match x {
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// Returns true if we want to maximize the given partial,
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TreeElement::Partial(s) => s,
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// and false if we want to fix it.
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_ => unreachable!(),
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filter: F,
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};
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) -> Vec<Symb>
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let mut new_str = String::new();
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where
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for c in x_str.chars() {
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F: Fn(&&TreeCoords) -> bool,
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if c == '_' {
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{
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new_str.push_str(&format!("{}", numbers.next().unwrap()))
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// Fill maximizer slots with arbitrary numbers
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} else {
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let min_tree_base = fill_partials(
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new_str.push(c);
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}
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}
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*x = TreeElement::Number(new_str.parse().unwrap())
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}
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tmp_tree
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}
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fn fill_mins(
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tree: &TreeElement,
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partials: &[TreeCoords],
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mut numbers: impl Iterator<Item = Symb>,
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) -> TreeElement {
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let mut tmp_tree = tree.clone();
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for p in partials.iter().filter(|x| x.get_inversion()) {
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let x = p.get_from_mut(&mut tmp_tree).unwrap();
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let x_str = match x {
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TreeElement::Partial(s) => s,
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_ => unreachable!(),
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};
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let mut new_str = String::new();
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for c in x_str.chars() {
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if c == '_' {
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new_str.push_str(&format!("{}", numbers.next().unwrap()))
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} else {
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new_str.push(c);
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}
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}
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*x = TreeElement::Number(new_str.parse().unwrap())
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}
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tmp_tree
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}
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fn find_best_maxs(tree: &TreeElement, partials: &[TreeCoords], maxs: &[Symb]) -> Vec<Symb> {
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// Fill maximizer slots in arbitrary order
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let min_tree_base = fill_mins(
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tree,
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tree,
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partials,
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partials.iter().filter(|x| !filter(x)),
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iter::repeat(Symb::Number(NonZeroU8::new(5).unwrap())),
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iter::repeat(&Symb::Number(NonZeroU8::new(5).unwrap())),
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);
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);
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let trees: Vec<(f32, Vec<&Symb>)> = maxs
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let partials_to_optimize: Vec<TreeCoords> = partials.iter().filter(filter).cloned().collect();
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.iter()
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let n_empty = free_chars(tree, partials_to_optimize.iter()).len();
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.permutations(maxs.len())
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println!("{:?}", n_empty);
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let trees: Vec<(f32, Vec<&Symb>)> = numbers
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.permutations(n_empty)
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.unique()
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.unique()
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.par_bridge()
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.filter_map(move |l| {
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.filter_map(|l| {
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let mut i = l.iter();
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let mut i = l.iter();
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let mut tmp_tree = min_tree_base.clone();
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let mut tmp_tree = min_tree_base.clone();
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for p in partials.iter().filter(|x| !x.get_inversion()) {
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for p in &partials_to_optimize {
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let x = p.get_from_mut(&mut tmp_tree).unwrap();
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let x = p.get_from_mut(&mut tmp_tree).unwrap();
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let x_str = match x {
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let x_str = match x {
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@ -312,82 +63,128 @@ fn find_best_maxs(tree: &TreeElement, partials: &[TreeCoords], maxs: &[Symb]) ->
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*x = TreeElement::Number(new_str.parse().unwrap())
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*x = TreeElement::Number(new_str.parse().unwrap())
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}
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}
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println!("{:?}", tmp_tree);
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tmp_tree.evaluate().map(|x| (x, l))
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tmp_tree.evaluate().map(|x| (x, l))
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})
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})
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.collect();
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.collect();
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let mut max_list: Option<Vec<&Symb>> = None;
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let mut best_list: Option<Vec<&Symb>> = None;
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let mut best_value: Option<f32> = None;
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let mut best_value: Option<f32> = None;
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for (x, list) in trees {
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for (x, list) in trees {
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if let Some(m) = best_value {
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if let Some(m) = best_value {
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if m < x {
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if (minimize && x < m) || (!minimize && x > m) {
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best_value = Some(x);
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best_value = Some(x);
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max_list = Some(list);
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best_list = Some(list);
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}
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}
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} else {
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} else {
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best_value = Some(x);
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best_value = Some(x);
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max_list = Some(list);
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best_list = Some(list);
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}
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}
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}
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}
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max_list.unwrap().into_iter().cloned().collect()
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best_list.unwrap().into_iter().cloned().collect()
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}
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}
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fn find_best_mins(tree: &TreeElement, partials: &[TreeCoords], mins: &[Symb]) -> Vec<Symb> {
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fn find_best_numbers(
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// Fill maximizer slots in arbitrary order
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tree: &TreeElement,
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let min_tree_base = fill_maxs(
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partials: &[TreeCoords],
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// The numbers we're allowed to add, sorted in ascending order
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available_numbers: &[Symb],
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) -> TreeElement {
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// Fill all empty slots with fives
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let tree_filled = fill_partials(
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tree,
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tree,
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partials,
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partials.iter(),
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iter::repeat(Symb::Number(NonZeroU8::new(5).unwrap())),
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iter::repeat(&Symb::Number(NonZeroU8::new(5).unwrap())),
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);
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);
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let trees: Vec<(f32, Vec<&Symb>)> = mins
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let base = tree_filled.evaluate().unwrap();
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.iter()
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.permutations(mins.len())
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.unique()
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.par_bridge()
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.filter_map(|l| {
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let mut i = l.iter();
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let mut tmp_tree = min_tree_base.clone();
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for p in partials.iter().filter(|x| x.get_inversion()) {
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let x = p.get_from_mut(&mut tmp_tree).unwrap();
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let x_str = match x {
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// Test each slot:
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TreeElement::Partial(s) => s,
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// Increase its value by 1, and record its effect on the
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_ => unreachable!(),
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// expression's total value.
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};
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// This isn't a perfect metric, but it's pretty good.
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let mut new_str = String::new();
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let mut slots: Vec<(usize, &TreeCoords, usize, f32)> = free_chars(tree, partials.iter())
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for c in x_str.chars() {
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.into_iter()
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if c == '_' {
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.enumerate()
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new_str.push_str(&format!("{}", i.next().unwrap()))
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.map(|(i_slot, (c, i))| {
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} else {
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let mut new_tree = tree_filled.clone();
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new_str.push(c);
|
let p = c.get_from_mut(&mut new_tree).unwrap();
|
||||||
}
|
match p {
|
||||||
}
|
TreeElement::Partial(s) => s.replace_range(i..i + 1, "6"),
|
||||||
*x = TreeElement::Number(new_str.parse().unwrap())
|
_ => unreachable!(),
|
||||||
}
|
}
|
||||||
|
// This shouldn't ever be None.
|
||||||
tmp_tree.evaluate().map(|x| (x, l))
|
(i_slot, c, i, new_tree.evaluate().unwrap() - base)
|
||||||
})
|
})
|
||||||
.collect();
|
.collect();
|
||||||
|
|
||||||
let mut min_list: Option<Vec<&Symb>> = None;
|
// Sort by least to most influence
|
||||||
let mut best_value: Option<f32> = None;
|
slots.sort_by(|a, b| a.3.partial_cmp(&b.3).unwrap());
|
||||||
|
|
||||||
for (x, list) in trees {
|
let all_symbols = {
|
||||||
if let Some(m) = best_value {
|
// We need this many from the bottom, and this many from the top.
|
||||||
if m < x {
|
let neg_count = slots.iter().filter(|(_, _, _, x)| *x <= 0.0).count();
|
||||||
best_value = Some(x);
|
let pos_count = slots.iter().filter(|(_, _, _, x)| *x > 0.0).count();
|
||||||
min_list = Some(list);
|
|
||||||
|
let mut a_iter = available_numbers
|
||||||
|
.iter()
|
||||||
|
.take(neg_count)
|
||||||
|
.chain(available_numbers.iter().rev().take(pos_count).rev());
|
||||||
|
|
||||||
|
let mut g = slots
|
||||||
|
// Group slots with equal weights
|
||||||
|
// and count the number of elements in each group
|
||||||
|
.iter()
|
||||||
|
.group_by(|x| x.3)
|
||||||
|
.into_iter()
|
||||||
|
.map(|(_, x)| x.count())
|
||||||
|
// Generate the digits we should try for each group of
|
||||||
|
// equal-weight slots
|
||||||
|
.map(|s| {
|
||||||
|
(0..s)
|
||||||
|
.map(|_| a_iter.next().unwrap().clone())
|
||||||
|
.permutations(s)
|
||||||
|
.unique()
|
||||||
|
.collect_vec()
|
||||||
|
})
|
||||||
|
// Now, covert this to an array of all cartesian products
|
||||||
|
// of this set of sets
|
||||||
|
.multi_cartesian_product()
|
||||||
|
.map(|x| x.iter().flatten().cloned().collect_vec())
|
||||||
|
.map(|v| slots.iter().zip(v).collect_vec())
|
||||||
|
.collect_vec();
|
||||||
|
|
||||||
|
// Sort these vectors so the order of values
|
||||||
|
// matches the order of empty slots
|
||||||
|
g.iter_mut()
|
||||||
|
.for_each(|v| v.sort_by(|(a, _), (b, _)| a.0.partial_cmp(&b.0).unwrap()));
|
||||||
|
g.into_iter()
|
||||||
|
.map(|v| v.into_iter().map(|(_, s)| s).collect_vec())
|
||||||
|
};
|
||||||
|
|
||||||
|
let mut best_tree = None;
|
||||||
|
let mut best_value = None;
|
||||||
|
for i in all_symbols {
|
||||||
|
let tmp_tree = fill_partials(&tree, partials.iter(), i.iter());
|
||||||
|
let val = tmp_tree.evaluate();
|
||||||
|
|
||||||
|
if let Some(val) = val {
|
||||||
|
if let Some(best) = best_value {
|
||||||
|
if val > best {
|
||||||
|
best_value = Some(val);
|
||||||
|
best_tree = Some(tmp_tree)
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
best_value = Some(val);
|
||||||
|
best_tree = Some(tmp_tree)
|
||||||
}
|
}
|
||||||
} else {
|
|
||||||
best_value = Some(x);
|
|
||||||
min_list = Some(list);
|
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
min_list.unwrap().into_iter().cloned().collect()
|
best_tree.unwrap()
|
||||||
}
|
}
|
||||||
|
|
||||||
impl MinMaxTree {}
|
impl MinMaxTree {}
|
||||||
|
@ -397,9 +194,6 @@ impl MinimizerAgent for MinMaxTree {
|
||||||
let tree = board.to_tree();
|
let tree = board.to_tree();
|
||||||
let partials = find_partials(&tree);
|
let partials = find_partials(&tree);
|
||||||
|
|
||||||
let max_slots = count_max_slots(&tree, &partials);
|
|
||||||
let min_slots = count_min_slots(&tree, &partials);
|
|
||||||
|
|
||||||
let available_numbers = (0..=9)
|
let available_numbers = (0..=9)
|
||||||
.map(|x| match x {
|
.map(|x| match x {
|
||||||
0 => Symb::Zero,
|
0 => Symb::Zero,
|
||||||
|
@ -408,32 +202,13 @@ impl MinimizerAgent for MinMaxTree {
|
||||||
.filter(|x| !board.contains(*x))
|
.filter(|x| !board.contains(*x))
|
||||||
.collect::<Vec<_>>();
|
.collect::<Vec<_>>();
|
||||||
|
|
||||||
if available_numbers.len() < max_slots {
|
// For the code below, we must guarantee that
|
||||||
|
// that is, min_slots + max_slots <= available_numbers.len
|
||||||
|
if available_numbers.len() < free_chars(&tree, partials.iter()).len() {
|
||||||
return RandomAgent {}.step_max(board);
|
return RandomAgent {}.step_max(board);
|
||||||
}
|
}
|
||||||
|
|
||||||
// Assume these won't ever overlap
|
let t = find_best_numbers(&tree, &partials, &available_numbers);
|
||||||
// (that is, min_slots + max_slots <= available_numbers.len)
|
|
||||||
let mins: Vec<Symb> = available_numbers[0..min_slots].to_vec();
|
|
||||||
let maxs: Vec<Symb> = available_numbers[available_numbers.len() - max_slots..]
|
|
||||||
.iter()
|
|
||||||
.copied()
|
|
||||||
.rev()
|
|
||||||
.collect();
|
|
||||||
|
|
||||||
let t = tree.clone();
|
|
||||||
let p = partials.clone();
|
|
||||||
let ha = thread::spawn(move || find_best_mins(&t, &p, &mins[..]));
|
|
||||||
|
|
||||||
let t = tree.clone();
|
|
||||||
let p = partials.clone();
|
|
||||||
let hb = thread::spawn(move || find_best_maxs(&t, &p, &maxs[..]));
|
|
||||||
|
|
||||||
let best_min_list = ha.join().unwrap();
|
|
||||||
let best_max_list = hb.join().unwrap();
|
|
||||||
|
|
||||||
let t = fill_mins(&tree, &partials, best_min_list.into_iter());
|
|
||||||
let t = fill_maxs(&t, &partials, best_max_list.into_iter());
|
|
||||||
|
|
||||||
println!("{:?}", t);
|
println!("{:?}", t);
|
||||||
RandomAgent {}.step_max(board)
|
RandomAgent {}.step_max(board)
|
||||||
|
|
|
@ -2,6 +2,7 @@ mod diffuse;
|
||||||
mod minmaxtree;
|
mod minmaxtree;
|
||||||
mod player;
|
mod player;
|
||||||
mod random;
|
mod random;
|
||||||
|
pub mod util;
|
||||||
|
|
||||||
pub use diffuse::DiffuseAgent;
|
pub use diffuse::DiffuseAgent;
|
||||||
pub use minmaxtree::MinMaxTree;
|
pub use minmaxtree::MinMaxTree;
|
||||||
|
|
|
@ -0,0 +1,6 @@
|
||||||
|
/// Common helper functions that may be used by agents.
|
||||||
|
mod partials;
|
||||||
|
mod treecoords;
|
||||||
|
|
||||||
|
pub use partials::*;
|
||||||
|
pub use treecoords::*;
|
|
@ -0,0 +1,96 @@
|
||||||
|
use super::{TreeCoords, TreeDir};
|
||||||
|
use crate::{board::TreeElement, util::Symb};
|
||||||
|
|
||||||
|
/// Find the coordinates of all partials in the given tree
|
||||||
|
pub fn find_partials(tree: &TreeElement) -> Vec<TreeCoords> {
|
||||||
|
let mut partials = Vec::new();
|
||||||
|
let mut current_coords = TreeCoords::new();
|
||||||
|
|
||||||
|
loop {
|
||||||
|
let t = current_coords.get_from(tree).unwrap();
|
||||||
|
match t {
|
||||||
|
TreeElement::Number(_) | TreeElement::Partial(_) => {
|
||||||
|
if let TreeElement::Partial(_) = t {
|
||||||
|
partials.push(current_coords);
|
||||||
|
}
|
||||||
|
|
||||||
|
loop {
|
||||||
|
match current_coords.pop() {
|
||||||
|
Some((TreeDir::Left, _)) => {
|
||||||
|
current_coords.push(
|
||||||
|
TreeDir::Right,
|
||||||
|
match current_coords.get_from(tree) {
|
||||||
|
Some(TreeElement::Add { .. }) => current_coords.is_inverted(),
|
||||||
|
Some(TreeElement::Mul { .. }) => current_coords.is_inverted(),
|
||||||
|
Some(TreeElement::Sub { .. }) => !current_coords.is_inverted(),
|
||||||
|
Some(TreeElement::Div { .. }) => !current_coords.is_inverted(),
|
||||||
|
_ => unreachable!(),
|
||||||
|
},
|
||||||
|
);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
Some((TreeDir::Right, _)) => {}
|
||||||
|
Some((TreeDir::This, _)) => unreachable!(),
|
||||||
|
None => return partials,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
TreeElement::Div { .. }
|
||||||
|
| TreeElement::Mul { .. }
|
||||||
|
| TreeElement::Sub { .. }
|
||||||
|
| TreeElement::Add { .. } => current_coords.push(TreeDir::Left, current_coords.is_inverted()),
|
||||||
|
TreeElement::Neg { .. } => {
|
||||||
|
current_coords.push(TreeDir::Right, !current_coords.is_inverted())
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Fill empty slots in the given partials, in order.
|
||||||
|
/// Will panic if we run out of numbers to fill with.
|
||||||
|
///
|
||||||
|
/// Returns a new tree with filled partials.
|
||||||
|
pub fn fill_partials<'a>(
|
||||||
|
tree: &'a TreeElement,
|
||||||
|
partials: impl Iterator<Item = &'a TreeCoords>,
|
||||||
|
mut numbers: impl Iterator<Item = &'a Symb>,
|
||||||
|
) -> TreeElement {
|
||||||
|
let mut tmp_tree = tree.clone();
|
||||||
|
for p in partials {
|
||||||
|
let x = p.get_from_mut(&mut tmp_tree).unwrap();
|
||||||
|
|
||||||
|
let x_str = match x {
|
||||||
|
TreeElement::Partial(s) => s,
|
||||||
|
_ => unreachable!(),
|
||||||
|
};
|
||||||
|
let mut new_str = String::new();
|
||||||
|
for c in x_str.chars() {
|
||||||
|
if c == '_' {
|
||||||
|
new_str.push_str(&format!("{}", numbers.next().unwrap()))
|
||||||
|
} else {
|
||||||
|
new_str.push(c);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
*x = TreeElement::Partial(new_str)
|
||||||
|
}
|
||||||
|
|
||||||
|
tmp_tree
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Find all empty slots in the given partials
|
||||||
|
/// Returns (coords of partial, index of slot in string)
|
||||||
|
pub fn free_chars<'a>(
|
||||||
|
tree: &'a TreeElement,
|
||||||
|
partials: impl Iterator<Item = &'a TreeCoords>,
|
||||||
|
) -> Vec<(&TreeCoords, usize)> {
|
||||||
|
partials
|
||||||
|
.flat_map(|x| match x.get_from(tree) {
|
||||||
|
Some(TreeElement::Partial(s)) => {
|
||||||
|
s.chars()
|
||||||
|
.enumerate()
|
||||||
|
.filter_map(move |(i, c)| if c == '_' { Some((x, i)) } else { None })
|
||||||
|
}
|
||||||
|
_ => unreachable!(),
|
||||||
|
})
|
||||||
|
.collect()
|
||||||
|
}
|
|
@ -0,0 +1,137 @@
|
||||||
|
use std::fmt::{Debug, Display};
|
||||||
|
|
||||||
|
use crate::board::TreeElement;
|
||||||
|
|
||||||
|
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
|
||||||
|
pub enum TreeDir {
|
||||||
|
Right,
|
||||||
|
Left,
|
||||||
|
This,
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Clone, Copy)]
|
||||||
|
pub struct TreeCoords {
|
||||||
|
len: usize,
|
||||||
|
coords: [TreeDir; 4],
|
||||||
|
inversion: [bool; 4],
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Display for TreeCoords {
|
||||||
|
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
|
||||||
|
if self.is_inverted() {
|
||||||
|
write!(f, "-")?
|
||||||
|
} else {
|
||||||
|
write!(f, "+")?
|
||||||
|
}
|
||||||
|
|
||||||
|
for c in self.coords {
|
||||||
|
match c {
|
||||||
|
TreeDir::Left => write!(f, "L")?,
|
||||||
|
TreeDir::Right => write!(f, "R")?,
|
||||||
|
TreeDir::This => break,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
Ok(())
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Debug for TreeCoords {
|
||||||
|
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
|
||||||
|
Display::fmt(self, f)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[allow(dead_code)]
|
||||||
|
impl TreeCoords {
|
||||||
|
pub fn new() -> Self {
|
||||||
|
Self {
|
||||||
|
len: 0,
|
||||||
|
coords: [TreeDir::This; 4],
|
||||||
|
inversion: [false; 4],
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn push(&mut self, dir: TreeDir, invert: bool) {
|
||||||
|
if self.len == 4 || dir == TreeDir::This {
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
self.coords[self.len] = dir;
|
||||||
|
self.inversion[self.len] = invert;
|
||||||
|
self.len += 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn pop(&mut self) -> Option<(TreeDir, bool)> {
|
||||||
|
if self.len == 0 {
|
||||||
|
return None;
|
||||||
|
}
|
||||||
|
|
||||||
|
self.len -= 1;
|
||||||
|
let dir = self.coords[self.len];
|
||||||
|
let inv = self.inversion[self.len];
|
||||||
|
self.coords[self.len] = TreeDir::This;
|
||||||
|
self.inversion[self.len] = false;
|
||||||
|
Some((dir, inv))
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn is_inverted(&self) -> bool {
|
||||||
|
if self.len == 0 {
|
||||||
|
false
|
||||||
|
} else {
|
||||||
|
self.inversion[self.len - 1]
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn get_from<'a>(&self, mut tree: &'a TreeElement) -> Option<&'a TreeElement> {
|
||||||
|
for i in 0..self.len {
|
||||||
|
match &self.coords[i] {
|
||||||
|
TreeDir::Left => {
|
||||||
|
if let Some(t) = tree.left() {
|
||||||
|
tree = t
|
||||||
|
} else {
|
||||||
|
return None;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
TreeDir::Right => {
|
||||||
|
if let Some(t) = tree.right() {
|
||||||
|
tree = t
|
||||||
|
} else {
|
||||||
|
return None;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
TreeDir::This => return Some(tree),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
Some(tree)
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn get_from_mut<'a>(&self, mut tree: &'a mut TreeElement) -> Option<&'a mut TreeElement> {
|
||||||
|
for i in 0..self.len {
|
||||||
|
match &self.coords[i] {
|
||||||
|
TreeDir::Left => {
|
||||||
|
if let Some(t) = tree.left_mut() {
|
||||||
|
tree = t
|
||||||
|
} else {
|
||||||
|
return None;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
TreeDir::Right => {
|
||||||
|
if let Some(t) = tree.right_mut() {
|
||||||
|
tree = t
|
||||||
|
} else {
|
||||||
|
return None;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
TreeDir::This => return Some(tree),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
Some(tree)
|
||||||
|
}
|
||||||
|
}
|
Loading…
Reference in New Issue