Compilare: main.cpp: In function 'void Back(std::vector<long long int>&, long long int, long long int)': main.cpp:65:34: 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] 65 | for(int i = sub[k-1] + 1LL; i < factoriprimi.size(); i++) | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:69:13: 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] 69 | if(k < factoriprimi.size()) | ~~^~~~~~~~~~~~~~~~~~~~~