Compilare: main.cpp: In function 'int main()': main.cpp:79:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 79 | for(int i=0; i<rez.size(); i++) | ~^~~~~~~~~~~ main.cpp:82:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 82 | for(int j=0; j<rez[i].size(); j++) | ~^~~~~~~~~~~~~~