use std::{
    collections::{BTreeSet, HashMap},
    hash::Hash,
};

fn main() {
    proconio::input! {
        n: usize,
        c: [u64; n],
    }
    let sum = c.iter().sum::<u64>();
    println!("{}", c.iter().filter(|c| *c * 10 <= sum).count() * 30);
}