#include #define rep(i, a, n) for (int i = a; i < n; i++) #define repr(i, a, n) for (int i = n - 1; i >= a; i--) using namespace std; using ll = long long; using P = pair; template void chmin(T &a, T b) { a = min(a, b); } template void chmax(T &a, T b) { a = max(a, b); } int main() { ios::sync_with_stdio(false); cin.tie(0); int n; cin >> n; vector c(n); rep(i, 0, n) cin >> c[i]; ll sum_val = accumulate(c.begin(), c.end(), 0); int ans = 0; rep(i, 0, n) { if (c[i] <= sum_val / 10) ans++; } cout << ans * 30 << endl; }