fn main() {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    let s = s.trim().chars().collect::<Vec<_>>();

    let n = s.len();
    let val = (0..n).filter(|&i| s[i] == '1').map(|i| i+1).sum::<usize>();
    let cnt = (0..n).filter(|&i| s[i] == '1').count();
    let mut dp = vec![vec![vec![0usize; cnt+1]; val+1]; n+1];
    dp[0][0][0] = 1; 
    for i in 0..n {
        for j in 0..=val {
            for k in 0..=cnt {
                if dp[i][j][k] == 0 { continue; }
                dp[i+1][j][k] += dp[i][j][k];
                if j+i+1 <= val && k+1 <= cnt {
                    dp[i+1][j+i+1][k+1] += dp[i][j][k];
                }
            }
        }
    }
    println!("{}", dp[n][val][cnt]);
}