# -*- coding: utf-8 -*-
hako = int(input())
kosuu = int(input())
width = input().split()

width_i = [int(s) for s in width]
width_i.sort()

count = 0
total = 0
for i in width_i:
    total = total + i
    count += 1
    if total > hako:
        count = count - 1
        break
print(count)