#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n,k;
    cin>>k>>n;
    int a[205];
    for (int i =0;i<n;i++) cin >>a[i];
    for (int i =1;i<=n-1;i++)
    {
        for (int j=0;j<=n-1-i;j++)
        {
            if(a[j] < a[j+1]) swap(a[j],a[j+1]);
        }
    }
    int s =0;
    int cnt =0;
    int flag = 1;
    for(int i =0;i<n;i++)
    {
        s += a[i];
        cnt ++;
        if (s >= k)
        {
            flag =0;
            break;
        }
    }

    if (flag ==1) cout << "NO";
    else cout << cnt ;


    return 0;
}

/**************************************************************
	Problem: 1326
	User: mariooo
	Language: C++
	Result: Accepted
	Time:13 ms
	Memory:2072 kb
****************************************************************/