Compilare: main.cpp: In function 'std::vector<long long int> primeFactors(long long int)': main.cpp:43:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | if(i==primes.size()) | ~^~~~~~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:70:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 70 | for(int j=0; j<factors.size(); j++) | ~^~~~~~~~~~~~~~~