Compilare: main.cpp: In function 'void dfs(long long int, long long int, long long int)': main.cpp:71:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 71 | for(int i = 0;i<L[nod].size();i++){ | ~^~~~~~~~~~~~~~