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()
}

fn main() {
    let mut l: i32 = read();
    let mut m: i32 = read();
    let mut n: i32 = read();

    if l >= 25 {
        m += l / 25;
        l = l % 25;
    }
    if m >= 4 {
        n += m / 4;
        m = m % 4;
    }
    if n >= 10 {
        n = n % 10;
    }

    println!("{}", l + m + n);
}