Compilare: main.cpp: In function 'void dfs(int)': main.cpp:19:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for(int l=0;l<G[k].size();l++) | ~^~~~~~~~~~~~ main.cpp: In function 'void dfs1(int)': main.cpp:36:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(int l=0;l<fii[k].size();l++) | ~^~~~~~~~~~~~~~