Compilare: main.cpp: In function 'void dfs(long long int)': main.cpp:22:28: 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] 22 | for(long long i = 0; i < v[node].size(); i++) { | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:58:32: 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] 58 | for(long long i = 0; i < topo.size(); i++) { | ~~^~~~~~~~~~~~~ main.cpp:59:36: 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] 59 | for(long long j = 0; j < v[topo[i]].size(); j++) { | ~~^~~~~~~~~~~~~~~~~~~