Compilare: main.cpp: In function 'int main()': main.cpp:75:25: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare] 75 | if ( ans.size() != kk ) | ~~~~~~~~~~~^~~~~ main.cpp:77:24: 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] 77 | for ( i = 0; i < ans.size(); i++ ) | ~~^~~~~~~~~~~~