fn read<T: std::str::FromStr>() -> T
where
    <T as std::str::FromStr>::Err: std::fmt::Debug,
{
    let mut b = String::new();
    std::io::stdin().read_line(&mut b).unwrap();
    b.trim().parse().unwrap()
}

fn main() {
    let mut l: i32 = read();
    let _: i32 = read();
    let mut b = String::new();
    std::io::stdin().read_line(&mut b).unwrap();
    let v: Vec<&str> = b.split(' ').collect();
    let mut iv: Vec<i32> = vec![];
    for x in &v {
        iv.push(x.trim().parse().unwrap());
    }
    iv.sort();
    let mut ans: i32 = 0;
    for x in iv {
        if x <= l {
            l -= x;
            ans += 1;
        }
    }
    println!("{}", ans)
}