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

# No.5 数字のブロック
def main():
    l = int(input())
    n = int(input())
    w = list(map(int, input().split()))
    w.sort()
   
    count = 0
    if w[0] <= l:
        total = 0
        for x in range(n):
            total += w[x]
            if l < total:
                break
            count += 1

    print(count)
    
if __name__ == '__main__':
    main()