# -*- coding: utf-8 -*-
L =int(input())
N =int(input())
W=list(map(int,input().split()))
ans=0
count = 0
W.sort()

for length in W:
    ans+= length
    count = count +1
    if ans == L:
        break
    if ans > L:
        count = count-1
        break
print(count)