In file included from /in/Compile/check.cpp:7:
/in/sokoban.hpp:35:17: error: implicit conversion changes signedness: 'int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
    grid.resize(rows);
         ~~~~~~ ^~~~
/in/sokoban.hpp:37:14: error: implicit conversion changes signedness: 'int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
        grid[i].clear();
        ~~~~ ^
/in/sokoban.hpp:39:18: error: implicit conversion changes signedness: 'int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
            grid[i] += static_cast<char>(ch);
            ~~~~ ^
/in/sokoban.hpp:49:21: error: implicit conversion changes signedness: 'const int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
           grid[pos.row][pos.col] != '#';
           ~~~~ ~~~~^~~
/in/sokoban.hpp:49:30: error: implicit conversion changes signedness: 'const int' to 'std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
           grid[pos.row][pos.col] != '#';
           ~~~~          ~~~~^~~
/in/sokoban.hpp:83:59: error: implicit conversion changes signedness: 'int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
            pos new_player = {cur_player.row + directions[d].first, cur_player.col + directions[d].second};
                                               ~~~~~~~~~~ ^
/in/sokoban.hpp:83:97: error: implicit conversion changes signedness: 'int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
            pos new_player = {cur_player.row + directions[d].first, cur_player.col + directions[d].second};
                                                                                     ~~~~~~~~~~ ^
/in/sokoban.hpp:92:57: error: implicit conversion changes signedness: 'int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
                    pos new_box = {box.row + directions[d].first , box.col + directions[d].second};
                                             ~~~~~~~~~~ ^
/in/sokoban.hpp:92:89: error: implicit conversion changes signedness: 'int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
                    pos new_box = {box.row + directions[d].first , box.col + directions[d].second};
                                                                             ~~~~~~~~~~ ^
/in/sokoban.hpp:107:68: 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]
            bfsqueue.push({new_player, new_boxes, path + dir_chars[d]});
                                                         ~~~~~~~~~ ^
/in/sokoban.hpp:115:26: error: implicit conversion changes signedness: 'int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
    return (grid[box.row - 1][box.col] == '#' && grid[box.row][box.col - 1] == '#') ||
            ~~~~ ~~~~~~~~^~~
/in/sokoban.hpp:115:35: error: implicit conversion changes signedness: 'const int' to 'std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
    return (grid[box.row - 1][box.col] == '#' && grid[box.row][box.col - 1] == '#') ||
            ~~~~              ~~~~^~~
/in/sokoban.hpp:115:59: error: implicit conversion changes signedness: 'const int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
    return (grid[box.row - 1][box.col] == '#' && grid[box.row][box.col - 1] == '#') ||
                                                 ~~~~ ~~~~^~~
/in/sokoban.hpp:115:72: 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]
    return (grid[box.row - 1][box.col] == '#' && grid[box.row][box.col - 1] == '#') ||
                                                 ~~~~          ~~~~~~~~^~~
/in/sokoban.hpp:116:26: error: implicit conversion changes signedness: 'int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
           (grid[box.row - 1][box.col] == '#' && grid[box.row][box.col + 1] == '#') ||
            ~~~~ ~~~~~~~~^~~
/in/sokoban.hpp:116:35: error: implicit conversion changes signedness: 'const int' to 'std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
           (grid[box.row - 1][box.col] == '#' && grid[box.row][box.col + 1] == '#') ||
            ~~~~              ~~~~^~~
/in/sokoban.hpp:116:59: error: implicit conversion changes signedness: 'const int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
           (grid[box.row - 1][box.col] == '#' && grid[box.row][box.col + 1] == '#') ||
                                                 ~~~~ ~~~~^~~
/in/sokoban.hpp:116:72: 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]
           (grid[box.row - 1][box.col] == '#' && grid[box.row][box.col + 1] == '#') ||
                                                 ~~~~          ~~~~~~~~^~~
/in/sokoban.hpp:117:26: error: implicit conversion changes signedness: 'int' to 'std::vector::size_type' (aka 'unsigned long') [-Werror,-Wsign-conversion]
           (grid[box.row + 1][box.col] == '#' && grid[box.row][box.col - 1] == '#') ||
            ~~~~ ~~~~~~~~^~~
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
/in/Compile/Makefile:16: recipe for target 'main' failed
make: *** [main] Error 1