Compilare: main.cpp: In function 'void bkt(int, int, std::vector<std::vector<int> >&, std::vector<std::pair<int, int> >&, std::vector<Moves>&)': main.cpp:70:29: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 70 | if (_to > _from) { | ~~~~^~~~~~~ main.cpp:86:29: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 86 | if (_to > _from) { | ~~~~^~~~~~~