In file included from /in/Compile/check.cpp:7:
/in/sokoban.hpp:105:31: error: implicit conversion changes signedness: 'int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
            int dx=directions[i].first;
                   ~~~~~~~~~~ ^
/in/sokoban.hpp:106:31: error: implicit conversion changes signedness: 'int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
            int dy=directions[i].second;
                   ~~~~~~~~~~ ^
2 errors generated.
/in/Compile/Makefile:16: recipe for target 'main' failed
make: *** [main] Error 1