Compilare: main.cpp: In function 'int main()': main.cpp:82:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 82 | for (int i = 0; i<rez.size(); i++) { | ~^~~~~~~~~~~ main.cpp:84:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 84 | for (int j = 0; j<rez[i].size(); j++) { | ~^~~~~~~~~~~~~~