Added Moscow Puzzles

Misc/Moscow Puzzles/problems/255.tex

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+\documentclass[../main.tex]{subfiles}
+
+\begin{document}
+
+	\problem{The Lucas Problem}
+
+	This problem was invented by Edouard Lucas, a French nineteenth-century mathematician. \\
+	``Every day at noon,'' Lucas said, ``a ship leaves Le Havre for New York and another ship leaves New York for Le Havre. The trip lasts 7 days and 7 nights. How many New York-Le Havre ships will the ship leaving Le Havre today meet during its journey to New York? Can you answer graphically?
+
+	\begin{figure}[h]
+		\centering
+		\includegraphics[width=10cm]{255}
+	\end{figure}
+
+
+\end{document}