Move Project Euler under puzzles.

puzzles/project_euler/p266_PseudoSquareRoot.py

@@ -0,0 +1,30 @@
+/* Check cf5-opt.vim defs.
+VIM: let g:lcppflags="-std=c++11 -O2 -pthread"
+VIM: let g:wcppflags="/O2 /EHsc /DWIN32"
+VIM: let g:argv=""
+VIM-: let g:cf5output=0
+*/
+#include <iostream>
+#include <exception>
+
+/*
+*/
+
+int main ( void )
+{try{
+
+	return 0;
+}
+catch ( const std::exception& e )
+{
+	std::cerr << std::endl
+			<< "std::exception(\"" << e.what() << "\")." << std::endl;
+	return 2;
+}
+catch ( ... )
+{
+	std::cerr  << std::endl
+			<< "unknown exception." << std::endl;
+	return 1;
+}}
+