import sys
import os
f = open("C:/Users/user/Documents/python/yukicoder/import.txt","r")
sys.stdin = f

# -*- coding: utf-8 -*-

l = int(input())
n = int(input())
w = list(map(int,input().split()))

w.sort()

for i in range(1,n+1):
    if l >= w[i]:
        l -= w[i]
    else:
        ans = i
        break

print(ans)