#include <bits/stdc++.h>
#define FOR(i,bg,ed) for(ll i=(bg);i<(ed);i++)
#define REP(i,n) FOR(i,0,n)
#define MOD 1000000007
#define int long long
using namespace std;
typedef long long ll;
typedef vector<vector<ll>> mat;
const int INF = 1e9;



signed main()
{
    int N;
    int C[110];

    cin >> N;
    int sum = 0;
    REP(i,N) {
        cin >> C[i];
        sum += C[i];
    }

    int ans = 0;
    REP(i,N) {
        if (10 * C[i] <= sum) {
            ans += 30;
        }
    }

    cout << ans << endl;
}