// ---------- begin input macro ----------
// reference: https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
    ($($r:tt)*) => {
        let s = {
            use std::io::Read;
            let mut s = String::new();
            std::io::stdin().read_to_string(&mut s).unwrap();
            s
        };
        let mut iter = s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
}

macro_rules! input_inner {
    ($iter:expr) => {};
    ($iter:expr, ) => {};
    ($iter:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($iter, $t);
        input_inner!{$iter $($r)*}
    };
}

macro_rules! read_value {
    ($iter:expr, ( $($t:tt),* )) => {
        ( $(read_value!($iter, $t)),* )
    };
    ($iter:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()
    };
    ($iter:expr, chars) => {
        read_value!($iter, String).chars().collect::<Vec<char>>()
    };
    ($iter:expr, bytes) => {
        read_value!($iter, String).bytes().collect::<Vec<u8>>()
    };
    ($iter:expr, usize1) => {
        read_value!($iter, usize) - 1
    };
    ($iter:expr, $t:ty) => {
        $iter.next().unwrap().parse::<$t>().expect("Parse error")
    };
}
// ---------- end input macro ----------

use std::collections::*;

type Map<K, V> = BTreeMap<K, V>;

fn run() {
    input! {
        n: usize,
        a: [u32; n],
    }
    let mut dp = Map::new();
    for a in a {
        let mut next = dp.clone();
        for ((sum, max, cnt), way) in dp {
            *next.entry((sum + a, std::cmp::max(max, a), cnt + 1)).or_insert(0) += way;
        }
        *next.entry((a, a, 1)).or_insert(0u64) += 1;
        dp = next;
    }
    let mut ans = 0;
    for ((sum, max, cnt), way) in dp {
        if cnt >= 2 && sum % (cnt - 1) == 0 && max <= sum / (cnt - 1) {
            ans += way;
        }
    }
    println!("{}", ans);
}

fn main() {
    run();
}