Compilare: main.cpp: In function 'void dfsbun(int, int)': main.cpp:79:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 79 | for(int i = 0; i < fii.size(); i++) | ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:129:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 129 | for(int i = 0; i < v[c1].size(); i++) | ~~^~~~~~~~~~~~~~ main.cpp:136:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 136 | for(int i = 0; i < v[c2].size(); i++) | ~~^~~~~~~~~~~~~~