Compilare: main.cpp: In function 'void bfs(int, int*)': main.cpp:21:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(int i=0;i<v[k].size();i++){ | ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:46:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for(int j=0;j<v[i].size();j++){ | ~^~~~~~~~~~~~ main.cpp:58:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | for(int j=0;j<v[i].size();j++){ | ~^~~~~~~~~~~~