Compilare: main.cpp: In function 'void dfs(int)': main.cpp:17:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | for(int i=0;i<v[x].size();i++) | ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:53:18: 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] 53 | for(j=0;j<sol[i].size();j++) | ~^~~~~~~~~~~~~~