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