Compilare: main.cpp: In function 'int main()': main.cpp:21:18: warning: comparison of integer expressions of different signedness: 'int' and 'long long unsigned int' [-Wsign-compare] 21 | for(int i=0;i<n;i++){ | ~^~ main.cpp:31:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long unsigned int, std::allocator<long long unsigned int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for(int j=0;j<v[i].size();j++){ | ~^~~~~~~~~~~~