Compilare: main.cpp: In function 'void dfs(long long int)': main.cpp:16:19: 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] 16 | for(int i=0; i<muchii[u].size(); i++) | ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:67:19: 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] 67 | for(i=0; i<topo.size(); i++) | ~^~~~~~~~~~~~ main.cpp:70:23: 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] 70 | for(j=0; j<muchii[u].size(); j++) | ~^~~~~~~~~~~~~~~~~