Compilare: main.cpp: In function 'void dfs(int)': main.cpp:13:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for(int i=0; i<v[nod].size(); i++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int solve()': main.cpp:40:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(int i=0; i<v[nod].size(); i++) | ~^~~~~~~~~~~~~~ main.cpp:48:1: warning: no return statement in function returning non-void [-Wreturn-type] 48 | } | ^