#[allow(dead_code)]
mod cc_input {
    pub fn read_string() -> String {
        let mut s = String::new();
        std::io::stdin().read_line(&mut s).ok();
        return s.trim().to_string();
    }

    pub fn read<T: std::str::FromStr>() -> T {
        read_string().parse().ok().unwrap()
    }

    pub fn read_vec<T: std::str::FromStr>() -> Vec<T> {
        read_string()
            .split_whitespace()
            .map(|e| e.trim().parse().ok().unwrap())
            .collect()
    }

    pub fn read_pair<T: std::str::FromStr + std::clone::Clone>() -> (T, T) {
        let mut xs: Vec<T> = read_vec();
        xs.reverse();
        return (xs.pop().unwrap(), xs.pop().unwrap());
    }

    pub fn drop_line() {
        read_string();
    }
}

fn main() {
    let l: isize = cc_input::read();
    cc_input::drop_line();
    let mut ws: Vec<isize> = cc_input::read_vec();

    let (mut _sum, mut _count) = (0, 0);
    ws.sort();

    for e in ws.iter() {
        _sum += e;
        if _sum > l {
            break;
        }
        _count += 1;
    }

    println!("{}", _count);
}