#include<iostream> #include<string> #include<string.h> #include<algorithm> #include<stdio.h> #include<cmath> #include<vector> #include<utility> #include<queue> #include<stack> #include<stdlib.h> #define FOR(i, a, b) for(int i=(a);i<=(b);i++) #define RFOR(i, a, b) for(int i=(a);i>=(b);i--) #define MOD 1000000007 using namespace std; int main(void) { int n; long long int t = 0; int total = 0; int c[101]; cin >> n; FOR(i, 1, n) { cin >> c[i]; total += c[i]; } FOR(i, 1, n) { if (c[i] <= total / 10) { t++; } } cout << t * 30 << endl; return 0; }