fn read_i32() -> i32{
    let mut line = String::new();
    std::io::stdin().read_line(&mut line).unwrap();
    line.trim().parse().unwrap()
}
fn main() {
    let l = read_i32();
    let m = read_i32();
    let n = read_i32();
    println!("{}", n % 25 + (n / 25 + m) % 4 + ((n / 25 + m) / 4 + l) % 10);
}