const LIMIT: usize = 100*50;

fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let n: usize = n.trim().parse().unwrap();
    let mut a = String::new();
    std::io::stdin().read_line(&mut a).ok();
    let mut a: Vec<usize> = a.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();

    a.sort();
    let mut dp = vec![vec![vec![0usize; LIMIT+1]; n+1]; n+1];
    dp[0][0][0] = 1;
    let mut result = 0usize;
    for i in 0..n {
        for j in 0..n {
            for k in 0..=LIMIT {
                if dp[i][j][k] == 0 { continue; }
                dp[i+1][j][k] += dp[i][j][k];
                let summary = k+a[i];
                dp[i+1][j+1][summary] += dp[i][j][k];
                if j+1 >= 2 && summary % j == 0 && summary / j >= a[i] {
                    result += dp[i][j][k];
                }
            }
        }
    }
    println!("{}", result);
}