#include <stdio.h>

void select_sort(int *, int);

int main(void)
{
  int width, num, i, max = 0;
  int elements[10000];

  scanf("%d%d", &width, &num);
  for(i = 0; i < num; i++)  scanf("%d", &elements[i]);
  select_sort(elements, num);

  i = 0;
  while(width > 0 && i < num){
    width -= elements[i];
    max++;
    if(width < 0){
      width += elements[i];
      max--;
      break;
    }
    i++;
  }
  printf("%d\n", max);

  return 0;
}

void select_sort(int *arr, int n)
{
  int temp, i, j;

  for(i = 0; i < n - 1; i++){
    for(j = i; j < n; j++){
      if(arr[i] > arr[j]){
        temp = arr[i];
        arr[i] = arr[j];
        arr[j] = temp;
      }
    }
  }
}