Compilare: main.cpp: In function 'void dfs(int)': main.cpp:25:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for (int i=0;i<l[nod].size();i++) { | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:59:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | for (int i=0;i<l[nod].size();i++) { | ~^~~~~~~~~~~~~~