Compilare: main.cpp: In function 'int main()': main.cpp:46:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for (int i=0; i<cifre.size(); i++){ | ~^~~~~~~~~~~~~ main.cpp:48:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for (int j=i+1; j<cifre.size(); j++){ | ~^~~~~~~~~~~~~