Compilare: main.cpp: In function 'void remove_edge(int, int)': main.cpp:22:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for(int i = 0; i < tree[a].size(); i++) | ~~^~~~~~~~~~~~~~~~ main.cpp:27:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(int i = 0; i < tree[b].size(); i++) | ~~^~~~~~~~~~~~~~~~