use std::io::Read;

fn solve(a: Vec<u64>) {
    let fibs = get_fib_list(a[0]);
    if fibs.last().unwrap() != &a[0] {
        println!("{}", 0);
    } else {
        let mut fibs = fibs.clone();
        let iter_num = if a[0] == 1u64 && a[1] == 1u64 { 3 } else { 4 };
        (0..iter_num).for_each(|_| {
            let n = fibs.iter().rev().take(2).sum();
            fibs.push(n);
        });
        let mut count = 0;
        for pair in fibs.iter().rev().take(5).rev().zip(a.iter()) {
            if pair.0 != pair.1 {
                break;
            } else {
                count += 1;
            }
        }
        println!("{}", count);
    }
}

fn get_fib_list(limit: u64) -> Vec<u64> {
    let mut ret = vec![0, 1, 1];
    while ret.last().unwrap() < &limit {
        let n: u64 = ret.iter().rev().take(2).sum();
        ret.push(n);
    }
    return ret;
}

fn main() {
    let mut a = String::new();
    std::io::stdin().read_to_string(&mut a).ok();
    let mut a: Vec<u64> = a.trim().split('\n').take(5).map(|s| s.trim().parse::<u64>().unwrap()).collect();
    a.reverse();
    solve(a);
}