#include <stdio.h>
#include <stdlib.h>

#define LMAX 10000

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

int main(void)
{
int i, len, bnum, sum, bwidth[LMAX];

scanf("%d", &len);
scanf("%d", &bnum);

for (i=0;i<bnum;i++) {
scanf("%d", &bwidth[i]);
}

qsort(bwidth, bnum, sizeof(int), cmpint);

for (i=0;i<bnum;i++) {
sum += bwidth[i];

if (sum > len) {
sum -= bwidth[i];
printf("%d\n", i);
break;
}

}

}