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> {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim()
        .split_whitespace()
        .map(|e| e.parse().ok().unwrap())
        .collect()
}

fn main() {
    let mut space: i32 = read();
    let num: i32 = read();
    let mut blocks: Vec<i32> = read_vec();
    blocks.sort();

    let mut count = 0;
    for i in 0..=(num as usize) {
        space = space - blocks[i];
        if (space < 0) {
            break;
        }
        count += 1;
    }
    println!("{}", count);
}