In file included from /in/Compile/check.cpp:7:
/in/sokoban.hpp:41:47: error: implicit conversion changes signedness: 'int' to 'size_t' (aka 'unsigned long') [-Werror,-Wsign-conversion]
        size_t hash = state.player.first * 31 + state.player.second;
               ~~~~   ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
/in/sokoban.hpp:43:32: error: implicit conversion changes signedness: 'int' to 'unsigned long' [-Werror,-Wsign-conversion]
            hash = hash * 31 + box_pos;
                             ~ ^~~~~~~
/in/sokoban.hpp:70:34: error: implicit conversion changes signedness: 'int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
            char cell = map.grid[i][j];
                        ~~~      ^
/in/sokoban.hpp:70:37: error: implicit conversion changes signedness: 'int' to 'std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
            char cell = map.grid[i][j];
                        ~~~         ^
/in/sokoban.hpp:63:21: error: implicit conversion loses integer precision: 'std::vector::size_type' (aka 'unsigned long') to 'int' [-Werror,-Wshorten-64-to-32]
    map.rows = grid.size();
             ~ ~~~~~^~~~~~
/in/sokoban.hpp:64:24: error: implicit conversion loses integer precision: 'std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::size_type' (aka 'unsigned long') to 'int' [-Werror,-Wshorten-64-to-32]
    map.cols = grid[0].size();
             ~ ~~~~~~~~^~~~~~
/in/sokoban.hpp:104:22: error: implicit conversion changes signedness: 'int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
        if (map.grid[row][col] == '#' || state.box_positions.count(box) > 1) {
            ~~~      ^~~
/in/sokoban.hpp:104:27: error: implicit conversion changes signedness: 'int' to 'std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
        if (map.grid[row][col] == '#' || state.box_positions.count(box) > 1) {
            ~~~           ^~~
/in/sokoban.hpp:116:22: error: implicit conversion changes signedness: 'int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
        if (map.grid[row][col] != 'T') {
            ~~~      ^~~
/in/sokoban.hpp:116:27: error: implicit conversion changes signedness: 'int' to 'std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
        if (map.grid[row][col] != 'T') {
            ~~~           ^~~
/in/sokoban.hpp:176:33: 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:177:33: error: implicit conversion changes signedness: 'int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
            int dy = directions[i].second;
                     ~~~~~~~~~~ ^
/in/sokoban.hpp:181:43: error: implicit conversion changes signedness: 'int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
            next.moves += direction_chars[i];
                          ~~~~~~~~~~~~~~~ ^
/in/sokoban.hpp:175:27: error: comparison of integers of different signs: 'int' and 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-compare]
        for (int i = 0; i < directions.size(); ++i) {
                        ~ ^ ~~~~~~~~~~~~~~~~~
/in/sokoban.hpp:212:17: error: implicit conversion changes signedness: 'int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
    grid.resize(rows);
         ~~~~~~ ^~~~
/in/sokoban.hpp:216:21: error: implicit conversion changes signedness: 'int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
        cin >> grid[i];
               ~~~~ ^
16 errors generated.
/in/Compile/Makefile:16: recipe for target 'main' failed
make: *** [main] Error 1