Compilare: main.cpp: In function 'void dfs(int)': main.cpp:18:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | for(int l=0;l<G[k].size();l++) | ~^~~~~~~~~~~~ main.cpp: In function 'void dfs1(int)': main.cpp:35:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for(int l=0;l<fii[k].size();l++) | ~^~~~~~~~~~~~~~