use std::io::Read;

fn main() {
    let mut buf = String::new();
    std::io::stdin().read_to_string(&mut buf).unwrap();
    
    let total: usize = buf.split_whitespace()
        .fold(0, |acc, n| acc + n.parse::<usize>().unwrap());
    
    println!("{}", 55-total);
}