Compilare: main.cpp: In function 'int main()': main.cpp:48:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for(int i=0;i<rez.size();i++){ | ~^~~~~~~~~~~ main.cpp:50:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | for(int j=0;j<rez[i].size();j++)fout<<rez[i][j]<<' '; | ~^~~~~~~~~~~~~~