Compilare: main.cpp: In function 'int bfs()': main.cpp:134:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<long long int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 134 | for(int j=0;j<la[nod].size();j++) | ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:215:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<long long int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 215 | for (int j=0;j<la[i].size();j++) { | ~^~~~~~~~~~~~~