Compilare: main.cpp: In function 'int main()': main.cpp:64:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | for (int i = 0; i<cicles.size(); i++) { | ~^~~~~~~~~~~~~~ main.cpp:66:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | for (int j = 0; j<cicles[i].size(); j++) { | ~^~~~~~~~~~~~~~~~~