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--- a/GNUDoku.C +++ b/GNUDoku.C @@ -25,6 +25,7 @@ #include <cstdlib> #include <cstdio> #include <ctime> +#include <cstring> #include <vector> #include <cassert> --- a/sudoku.C +++ b/sudoku.C @@ -10,6 +10,7 @@ #include <cstdio> #include <cstdlib> #include <ctime> +#include <cstring> #include <map> namespace sudoku