Compilare: main.cpp: In function 'int main()': main.cpp:37:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for(j=0;j<L[p].size();j++) | ~^~~~~~~~~~~~ main.cpp:73:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 73 | for(j=0;j<L[p].size();j++) | ~^~~~~~~~~~~~