#include <iostream> #include <algorithm> #include <string> #include <vector> #include <map> #include <set> #include <stdio.h> #include <cstring> #include <queue> #include <stack> #include <functional> #include <math.h> #include <iomanip> using namespace std; #define Would #define you const int INF = 999999999; const int MOD = 1e9 + 7; int n, k[105], sum, ans; int main() { cin >> n; for (int i = 0; i < n; ++i) { cin >> k[i]; sum += k[i]; } for (int i = 0; i < n; ++i) { if (sum / 10 >= k[i]) { ++ans; } } cout << ans * 30 << endl; }