Compilare: main.cpp: In function 'int main()': main.cpp:37:24: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for(long long i=0;i<di.size();i++) | ~^~~~~~~~~~ main.cpp:38:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for(long long j=0;j<di.size();j++) | ~^~~~~~~~~~