# coding:utf-8
import statistics
hako_L = int(input())
block_num = int(input())
block_list = list(map(int, input().split()))
block_list = sorted(block_list)

list_center = statistics.median(block_list)
a = 0
i = 0
c = 0
while True:
    try:
        c += 1
        a += block_list[i]
        i += 1
        if a > hako_L:
            break
        else:
            continue
    except IndexError:
            break
print(c - 1)