Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:66:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[2][x-1]-v[2][0]<ret) user.cpp:80:62: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(sw!=2&&j<n-1&&v[2][x-1]-v[2][0]<ret) user.cpp:92:3: error: request for member ‘clear’ in ‘v’, which is of non-class type ‘std::vector<int> [10005]’ v.clear(); ^~~~~