Compilare: main.cpp: In function 'void dfs(int)': main.cpp:30:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for(int i=0;i<v[x].size();i++){ | ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:45:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for(int j=0;j<v[i].size();j++){ | ~^~~~~~~~~~~~