fn getline() -> String{
    let mut ret = String::new();
    std::io::stdin().read_line(&mut ret).ok();
    ret
}

fn getvec(string: String) -> Vec<i32> {
    string.trim().split_whitespace()
        .map(|s| s.parse().unwrap())
        .collect()
}

fn bubblesort(v: &Vec<i32>) -> Vec<i32> {
    let mut dst = v.to_owned();
    for i in 0..dst.len() {
        for j in i..dst.len() {
            if dst[i] > dst[j] {
                dst.swap(i, j)
            }
        }
    }
    dst
}

fn solve(v: &Vec<i32>, l: i32) -> usize {
    let sorted = bubblesort(v);
    let mut acc = 0;
    for (i, a) in sorted.into_iter().enumerate() {
        acc += a;
        if acc > l {
            return i
        }
        else if acc == l {
            return i+1
        }
    }
    v.len()
}



fn main() {
    let l:i32 = getline().trim().parse().unwrap();
    let _:i32 = getline().trim().parse().unwrap();
    println!("{}", solve(&getvec(getline()), l))
}