Compilare: main.cpp: In member function 'void Solution::delete_edge(int, std::pair<int, int>)': main.cpp:101:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 101 | for(int i = 0; i < T[u].size(); ++ i) | ~~^~~~~~~~~~~~~