Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:14:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | for(i=0; i<a[x].size(); i++) | ~^~~~~~~~~~~~ main.cpp: In function 'void dfs1(int, int, int)': main.cpp:27:15: 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(i=0; i<a[x].size(); i++) | ~^~~~~~~~~~~~