Compilare: main.cpp: In function 'void BFS(int, int, int, int, std::vector<std::vector<int> >&, std::vector<std::vector<int> >&)': main.cpp:29:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for(int i = 0; i<mind.size(); i++){ | ~^~~~~~~~~~~~ main.cpp:30:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for(int j = 0; j<mind[0].size(); j++) | ~^~~~~~~~~~~~~~~ main.cpp:59:13: warning: this 'else' clause does not guard... [-Wmisleading-indentation] 59 | else | ^~~~ main.cpp:61:15: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'else' 61 | q.push({xnew, ynew}); | ^ main.cpp: In function 'int main()': main.cpp:91:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 91 | for(int i = 0; i<p.size(); i++){ | ~^~~~~~~~~ main.cpp:92:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 92 | for(int j = 0; j<p[0].size(); j++) | ~^~~~~~~~~~~~