Compilare: main.cpp: In function 'void find(int, int)': main.cpp:131:18: warning: comparison of integer expressions of different signedness: 'std::stack<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 131 | if (s.size() == k+1 || vec[s.top().first][s.top().second] == m) { | ~~~~~~~~~^~~~~~ main.cpp:132:22: warning: comparison of integer expressions of different signedness: 'std::stack<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 132 | if (s.size() == k+1 && vec[s.top().first][s.top().second] == m) { result++; } | ~~~~~~~~~^~~~~~