#!/usr/bin/env python3
# -*- coding:UTF-8 -*-

def main():
    wide = int(input())
    N = int(input())
    blocks = sorted([int(i) for i in input().split()])
    total = []
    for i in blocks:
    	if wide >= (sum(total) + i):
    		total.append(i)
    print (len(total))


if __name__ == '__main__':
    main()