Compilare: main.cpp: In function 'void bfs(int)': main.cpp:29:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for(int j = 0; j<a[nod].size(); ++j) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:61:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for(int j =0; j<a[x].size(); ++j) | ~^~~~~~~~~~~~ main.cpp:68:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 68 | for(int j =0; j<a[x].size(); ++j) | ~^~~~~~~~~~~~