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

L = int(raw_input())
N = int(raw_input())
W_list = map(int, raw_input().split())
W_list.sort()

sum = 0
count = 0
for block in W_list:
    sum += block
    if(sum > L):
        break
    count += 1

print count