#include <iostream> //cin, cout #include <vector> //vector #include <algorithm> //sort,min,max,count #include <string> //string,getline, to_string #include <cstdlib> //abs(int) #include <utility> //swap, pair #include <deque> //deque #include <climits> //INT_MAX #include <bitset> //bitset #include <cmath> //sqrt, ceil. M_PI, pow, sin #include <ios> //fixed #include <iomanip> //setprecision using namespace std; int main() { int N; cin >> N; int sum = 0; vector<int> C(N); for (int i = 0; i < N; i++) { cin >> C[i]; sum += C[i]; } double a = sum / 10.0; int ans = 0; for (int i = 0; i < N; i++) { if (a >= C[i]) { ans += 30; } } cout << ans << endl; return 0; }