use std::io::{self, BufRead};

fn exchange(a: i32, mut y: i32) -> (i32, i32) {
    if y < a {
        return (0, y);
    }
    let mut results = (0, 0);
    loop {
        if y < a {
            results.1 += y;
            return results;
        } else {
            y = y - a;
            results.0 += 1;
        }
    }
}

fn main() {
    let stdin = io::stdin();
    let mut line = stdin.lock().lines();
    let mut l: i32 = line.next().unwrap().unwrap().parse().unwrap();
    let mut m: i32 = line.next().unwrap().unwrap().parse().unwrap();
    let mut n: i32 = line.next().unwrap().unwrap().parse().unwrap();

    let mut result = 0;
    loop {
        if l < 10 && m < 4 && n < 25 {
            result += m + n + l;
            break;
        }
        if l != 0 && l >= 10 {
            let a = exchange(10, l);
            l = a.1;
        }
        if m != 0 && m >= 4 {
            let a = exchange(4, m);
            l += a.0;
            m = a.1
        }
        if n != 0 && n >= 25 {
            let a = exchange(25, m);
            l += a.0;
            n = a.1;
        }
    }
    println!("{}", result);
}