fn main() {
    let l: u32 = read();
    let n: u32 = read();
    let mut w: Vec<u32> = read_vec();
    w.sort();
    let mut count = 0;
    let mut sum = 0;
    for e in w {
        sum += e;
        if l < sum {
            break;
        }
        count += 1;
    }
    println!("{}", count);
}

fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}

fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    read::<String>().split_whitespace()
        .map(|e| e.parse().ok().unwrap()).collect()
}