use std::io::Read;

fn main() {
    let mut buf = String::new();
    std::io::stdin().read_to_string(&mut buf).unwrap();
    
    let mut iter = buf.split_whitespace();
    
    let mut l: isize = iter.next().unwrap().parse().unwrap();
    let n: usize = iter.next().unwrap().parse().unwrap();
    let mut blocks: Vec<isize> = iter.map(|b| b.parse::<isize>().unwrap()).collect();
    
    blocks.sort();
    
    let mut idx: usize = 0;
    
    while idx < n {
        l -= blocks[idx];
        if l < 0 { break }
        
        idx += 1;
    }
    
    println!("{}", idx);
}