Compilare: main.cpp: In function 'int main()': main.cpp:74:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 74 | for ( int i =0 ; i < edges.size(); i ++ ) | ~~^~~~~~~~~~~~~~ main.cpp:80:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 80 | for ( int j = i + 1; j < edges.size(); j ++ ) | ~~^~~~~~~~~~~~~~