#include<bits/stdc++.h>
using namespace std;
bool  cmp(int x,int y){
	return x>y;
}
int main(){
    int m,n,s=0,c=0,v=0;
    cin>>m>>n;
    int a[200];
    for(int i=1;i<=n;i++){
    	cin>>a[i];
    }
    sort(a+1,a+1+n,cmp);
    for(int i=1;i<=n;i++){
    	s=s+a[i];
    	c++;
    	if(s>=m){
    	v=1;
        break;
    	}
    }
    if(v==1) cout<<c;
	else cout<<"NO"; 
     
    return 0;
}

/**************************************************************
	Problem: 1326
	User: duyahan
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2076 kb
****************************************************************/