#!/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()
   
    answer = 0
    total = 0
    for i in range(N):
        total += W[i]
        if L >= total:
            answer += 1
        else:
            break

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