use std::io;
use std::io::prelude::*;
use std::io::BufReader;

fn run(args: &Vec<String>) -> Vec<String> {
    let l: u32 = args[0].parse().unwrap();
    //let n: u32 = args[0].parse().unwrap();
    let mut ws: Vec<u32> = args[2].split(' ').map(|s| s.parse().unwrap()).collect();

    ws.sort();
    let mut s = 0;
    let mut c = 0;

    for w in ws {
        s += w;
        if s > l {
            break;
        }
        c += 1
    }

    vec![c.to_string()]
}

fn main() {
    let args = lines(BufReader::new(io::stdin()));
    for line in run(&args) {
        println!("{}", line);
    }
}

fn lines<R: Read>(reader: BufReader<R>) -> Vec<String> {
    reader.lines().map(|l| l.unwrap()).collect()
}