#include <iostream> #include <vector> using namespace std; int main(int argc, char* argv[]) { int N; cin>>N; int i; vector<int> C(N); int Sum=0; for (i=0;i<N;i++){ cin>>C[i]; Sum+=C[i]; } Sum/=10; int ans=0; for (i=0;i<N;i++){ if (C[i]<=Sum){ ans++; } } cout<<ans*30<<endl; return 0; }