#include <bits/stdc++.h>
using namespace std;

main()
{
  int L,N;
  scanf("%d%d",&L,&N);
  int W[N];
  for (int i = 0; i < N; ++i) { 
    scanf("%d",&W[i]);        
  }
  int count=0;
  sort(W,W+N);
  for (int i = 0; i < N; ++i) { 
    if(L<W[i]){printf("%d\n",count);break;}
    else {L-=W[i];count++;}        
  }
  return 0;
  
}