#include <cstdio>
#include <cstdlib>
#include <vector>
#include <algorithm>

int compare_int(const void *a, const void *b)
{
  return *(int*)a - *(int*)b;
}

void CountBlock(int Boxwidth, int Blocknum, int *Blockwidth)
{

  int sum = 0;
  qsort(Blockwidth, Blocknum, sizeof(int), compare_int);
  for(int i=0;;i++){
    sum += Blockwidth[i];
    if ( Boxwidth < sum ){
      printf("%d\n",i);
      break;
    }
  }
}

int main(void)
{
  int Boxlength, Blocknum;
  scanf("%d",&Boxlength);
  scanf("%d",&Blocknum);
  
  int Blockwidth[Blocknum];
  for (int i=0;i<Blocknum;i++){
    scanf("%d",&Blockwidth[i]);
  }

  CountBlock(Boxlength, Blocknum, Blockwidth);
  return 0;
}