Compilare: main.cpp: In function 'void dfs(long long int, long long int)': main.cpp:24:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for(i=0; i<v[nod].size(); i++) | ~^~~~~~~~~~~~~~ main.cpp:30:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for(k=0; k<v[nod].size(); k++) | ~^~~~~~~~~~~~~~