#include <stdio.h>
int main(void) {
  int L;
  int n;
  int W[10000] = { 0 };
  int temp;
  
  scanf("%d",&L);
  scanf("%d",&n);

  for (int i = 0; i < n; i++) {
    scanf("%d",&W[i]);
  }
  //<<<<<
  for (int i = 0; i < n-1; i++) {
    for (int j = i+1; j < n; j++) {
      if (W[i] > W[j]) {
        temp = W[i];
        W[i] = W[j];
        W[j] = temp;
      }
    }
  }
  int sum=0;
  int i;
  for (i=0; i<n; i++) {
    sum+=W[i];
    if (sum>L) break;
  }
  printf("%d\n",i);
  

  return 0;
}