Compilare: main.cpp: In function 'int main()': main.cpp:60:25: 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] 60 | for(int j = 0;j < r.size(); ++j) | ~~^~~~~~~~~~ main.cpp:62:29: 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] 62 | for(int k = 0;k < r.size(); ++k) | ~~^~~~~~~~~~