use std::io::stdin;
use std::str::FromStr;

fn main(){
    let mut l = lread()[0];
    let n = lread()[0];
    let mut w = lread();
    w.sort();
    let mut result = 0;
    for i in w {
        l -= i;
        if l < 0 {
            break;
        } else {
            result += 1;
        }
    }
    println!("{}",result);
        
}
fn lread() -> Vec<i32> {
    let mut line = String::new();
    stdin().read_line(&mut line).unwrap();
    let z: Vec<&str> = line.split(' ').collect();
    let mut v: Vec<i32> = vec![];
    for i in &z {
        v.push(i32::from_str(i.trim_right()).unwrap());
    }
    v
}