#include<iostream>
#include<algorithm>
using namespace std;

int main(){
  int L,N,sum=0,count=0;
  cin >> L >> N;
  int block[N];
  for(int i=0; i<N; i++){
    cin >> block[i];
  }
  sort(block, block + N);
  for(int i=0; i<N; i++){
    sum+=block[i];
    if(sum<=L){
      count++;
    }else{
      break;
    }
  }
  cout << count << endl;

  return 0;
}