#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n,i,j=0,m=0,k=0,l=0,s=0;
    cin>>m;
    cin>>n;
    int h[100];
    for(i=0;i<n;i++){
        cin>>h[i];
    } 
    for(i=1;i<=n-1;i++){
        for(j=1;j<=n-i;j++){
            if(h[j-1]<h[j]){
                swap(h[j-1],h[j]);
            }
        }
    }
    for(i=0;i<n;i++){
        k+=h[i];
        if(k>=m){
            cout<<i+1;
            break;
        }
    }
    if(k<m){
        cout<<"NO";
    }
  
}
/**************************************************************
	Problem: 1326
	User: linzihang
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2072 kb
****************************************************************/