#include <stdio.h>
#include <stdlib.h>
int cmp(const void* a, const void* b)
{
  return (*(int*)a - *(int*)b);
}
int main()
{
  int N, L, i;
  int *W = NULL;
  scanf("%d", &L);
  scanf("%d", &N);
  W = (int*)malloc(sizeof(int)*N);
  for (i=0; i<N; i++) scanf("%d", W+i);
  qsort(W, N, sizeof(int), cmp);
  int kasan = 0;
  for (i=0; i<N; i++) {
    kasan += W[i];
    if (kasan > L) {
      break;
    }
  }
  int ans = i;
  printf("%d\n", ans);

  free(W);
  W = NULL;
  return 0;
}