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 solution()': main.cpp:59:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | for(int i=0; i<factors.size(); i++) | ~^~~~~~~~~~~~~~~ main.cpp: In function 'void backtracking(int)': main.cpp:78:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 78 | if(step==factors.size()-1) | ~~~~^~~~~~~~~~~~~~~~~~