In file included from /in/Compile/check.cpp:7:
/in/sokoban.hpp:42:12: error: implicit conversion loses integer precision: 'size_t' (aka 'unsigned long') to 'int' [-Werror,-Wshorten-64-to-32]
    return hash;
    ~~~~~~ ^~~~
1 error generated.
/in/Compile/Makefile:16: recipe for target 'main' failed
make: *** [main] Error 1