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

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

int main(void){
	int i, count;
	unsigned long int block_sum = 0;
	int box = 0;
	int block_num = 0;
	int block[10^4]={0};
	char str[10^5], *b;

	//箱の大きさ
	fgets(str, sizeof(str), stdin);
	box = atoi(str);
	//ブロックの数
	fgets(str, sizeof(str), stdin);
	block_num = atoi(str);

	//各ブロックサイズ
	fgets(str, sizeof(str), stdin);

	b = strtok(str, " ");
	block[0] = atoi(b);

	for(i = 1; i < block_num; i++){
		b = strtok(NULL, " ");
		block[i] = atoi(b);
	}

	//block[0] ~ block[block_num - 1]

	//各ブロックを昇順
	qsort(block, block_num, sizeof(int), compare_int);

	for(i = 0; i < block_num; i++){
		block_sum += block[i];
		if(block_sum <= box){
			count++;
		}
		else{
			break;
		}
	}

	printf("%d\n", count);

	return 0;
}