fn main() {
    let mut l: u32 = read();
    let mut m: u32 = read();
    let mut n: u32 = read();
    let d = n / 25;
    m += d;
    n -= d * 25;
    let d = m / 4;
    l += d;
    m -= d * 4;
    let d = l / 10;
    l -= d * 10;
    println!("{}", l+m+n);
}

fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}