fn main(){
    let mut sc = Scanner::new();
    let l = sc.i();
    let n = sc.i();
    let mut w = vec![];
    for _ in 0..n {
        w.push(sc.i());
    }
    w.sort();
    let mut ans = 0;
    let mut acc = 0;
    for e in w {
        if acc + e > l {
            break;
        }
        acc += e;
        ans += 1
    }
    println!("{}",ans);
}


#[allow(dead_code)]
struct Scanner {
    token_buffer : Vec<String>,
    index : usize,
}

#[allow(dead_code)]
impl Scanner {
    fn new() -> Scanner{
        Scanner { token_buffer: vec![], index: 0 }
    }

    fn fetch_token(&mut self) -> Result<String,&str> {
        if self.index < self.token_buffer.len() {
            self.index += 1;
            Ok(self.token_buffer[self.index - 1].clone())
        } else {
            let mut st = String::new();
            match std::io::stdin().read_line(&mut st) {
                Ok(l) => {
                    if l == 0 {
                        Err("End of file")
                    } else if st == "" {
                        self.next()
                    } else {
                        self.token_buffer = st.split_whitespace().map(|x| x.to_string() ).collect();
                        self.index = 0;
                        self.next()
                    }
                },
                Err(_) => Err("Falid to read line"),
            }
        }
    }

    fn next<T>(& mut self) -> Result<T,&str> where T: std::str::FromStr {
        match self.fetch_token() {
            Ok(r) => match r.parse::<T>() {
                Ok(r) => Ok(r),
                Err(_) => Err("Parse error"),
            },
            Err(e) => Err(e),
        }
    }

    fn i(& mut self) -> i32 {
        self.next::<i32>().unwrap()
    }
    fn f(& mut self) -> f64 {
        self.next::<f64>().unwrap()
    }
    fn s(& mut self) -> String {
        self.next::<String>().unwrap()
    }
}