# /usr/bin/env python
# -*- coding: utf-8 -*-

l = int(input())
n = int(input())
w = list(map(int,input().split()))
w.sort()
a = []
for i in range(0,n+1):
    a.append(w[i])
    if sum(a) > l:
        a.pop(-1)
        break
print(len(a))