Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:31:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for (int i = 0; i < g[nod].size(); ++i) { | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void output()': main.cpp:53:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | for (int i = 0; i < v.size(); ++i) | ~~^~~~~~~~~~