Compilare: main.cpp: In function 'void BFS(int, int, int, int, std::vector<std::vector<int> >&, std::vector<std::vector<int> >&)': main.cpp:26:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for(int i = 0; i<mind.size(); i++){ | ~^~~~~~~~~~~~ main.cpp:27:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(int j = 0; j<mind[0].size(); j++) | ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:85:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | for(int i = 0; i<p.size(); i++){ | ~^~~~~~~~~ main.cpp:86:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 86 | for(int j = 0; j<p[0].size(); j++) | ~^~~~~~~~~~~~