Compilare: main.cpp: In function 'void dfs(int, int, int)': main.cpp:59:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | for(int i=0;i<adj[x].size();i++){ | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:102:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 102 | for(int i=0;i<e.size();i++){ | ~^~~~~~~~~