Compilare: main.cpp: In function 'int main()': main.cpp:27:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<std::pair<long long int, long long int>, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for (int i=0;i<w.size();++i){ | ~^~~~~~~~~ main.cpp:28:13: warning: unused variable 'val' [-Wunused-variable] 28 | int val = w[i].first.first,ind = w[i].first.second; | ^~~