#[allow(unused)]
use proconio::{input, marker::Chars};

fn main() {
    input! {
        a: i32,
        b: i32,
        c: i32,
        d: i32,
    }
    if b + 31 - a >= c {
        println!("1")
    } else if b + 31 - a >= d {
        println!("2")
    } else {
        println!("3")
    }
}