use std::io;

fn main() {
    let mut l = String::new();
    let mut n = String::new();
    let mut w = String::new();
    io::stdin().read_line(&mut l).unwrap();
    io::stdin().read_line(&mut n).unwrap();
    io::stdin().read_line(&mut w).unwrap();
    
    let l: u32 = l.trim().parse().unwrap();
    let n: u32 = n.trim().parse().unwrap();
    
    let mut w: Vec<u32> = w.trim().split_whitespace()
        .map(|x| x.parse::<u32>().unwrap() ).collect();
    
    w.sort_by(|a, b| a.cmp(b));
    
    let mut length = 0u32;
    let mut counter = 0u32;
    for i in 0..n {
        length += w[i as usize];
        
        if length > l {
            break;
        }
        else {
            counter += 1;
        }
        
    }
    
    println!("{}", counter);
}