Compilare: main.cpp: In function 'void dfs(long long int, long long int)': main.cpp:20:20: 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] 20 | for (int i=0; i<v[x].size(); i++) | ~^~~~~~~~~~~~ main.cpp:26:24: 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] 26 | for (int i=0; i<v[x].size(); i++) | ~^~~~~~~~~~~~