#![allow(non_snake_case)]
#![allow(unused_imports)]
// use itertools::Itertools;
// use proconio::input;
// use proconio::marker::*;
use std::cmp::Reverse;
use std::collections::*;

fn main() {
    input! {
        T:usize,
        n:usize,
        t:[usize;n],
    }

    let mut dp = vec![n; 1 << n];
    dp[0] = 0;
    for s in 0..1 << n {
        let mut time = 0;
        for i in 0..n {
            if s & (1 << i) != 0 {
                time += t[i];
            }
        }

        if time <= T {
            dp[s] = 1;
        }
    }

    for s in 0..1 << n {
        let cfor = CFor::new(s, |&t| t != 0, |&t| (t - 1) & s);
        for t in cfor.into_iter() {
            dp[s] = dp[s].min(dp[t] + dp[t ^ s]);
        }
    }

    let ans = dp[(1 << n) - 1];
    println!("{}", ans);
}

struct CFor<T, F, G>
where
    T: Copy,
    F: Fn(&T) -> bool,
    G: Fn(&T) -> T,
{
    state: T,
    inited: bool,
    is_continue: F,
    update: G,
}

impl<T, F, G> CFor<T, F, G>
where
    T: Copy,
    F: Fn(&T) -> bool,
    G: Fn(&T) -> T,
{
    fn new(init: T, is_continue: F, update: G) -> Self {
        Self {
            state: init,
            inited: false,
            is_continue,
            update,
        }
    }
}

impl<T, F, G> Iterator for CFor<T, F, G>
where
    T: Copy,
    F: Fn(&T) -> bool,
    G: Fn(&T) -> T,
{
    type Item = T;

    fn next(&mut self) -> Option<Self::Item> {
        if !self.inited {
            self.inited = true;

            if (self.is_continue)(&self.state) {
                return Some(self.state);
            } else {
                return None;
            }
        }

        self.state = (self.update)(&self.state);
        if (self.is_continue)(&self.state) {
            return Some(self.state);
        } else {
            return None;
        }
    }
}

mod input {
    #[macro_export]
    macro_rules! input {
        (source = $s:expr, $($r:tt)*) => {
            let mut iter = $s.split_whitespace();
            input_inner!{iter, $($r)*}
        };
        ($($r:tt)*) => {
            let s = {
                use std::io::Read;
                let mut s = String::new();
                std::io::stdin().read_to_string(&mut s).unwrap();
                s
            };
            let mut iter = s.split_whitespace();
            input_inner!{iter, $($r)*}
        };
    }

    #[macro_export]
    macro_rules! input_inner {
        ($iter:expr) => {};
        ($iter:expr, ) => {};

        ($iter:expr, $var:ident : $t:tt $($r:tt)*) => {
            let $var = read_value!($iter, $t);
            input_inner!{$iter $($r)*}
        };
    }

    #[macro_export]
    macro_rules! read_value {
        ($iter:expr, ( $($t:tt),* )) => {
            ( $(read_value!($iter, $t)),* )
        };

        ($iter:expr, [ $t:tt ; $len:expr ]) => {
            (0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()
        };

        ($iter:expr, chars) => {
            read_value!($iter, String).chars().collect::<Vec<char>>()
        };

        ($iter:expr, usize1) => {
            read_value!($iter, usize) - 1
        };

        ($iter:expr, $t:ty) => {
            $iter.next().unwrap().parse::<$t>().expect("Parse error")
        };
    }
}