Compilare: main.cpp: In function 'long long int solve(int, int)': main.cpp:65:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 65 | for(int i=0; i<v.size(); ++i){ | ~^~~~~~~~~ main.cpp:66:29: 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=i+1; j<v.size(); ++j){ | ~^~~~~~~~~