#!/usr/bin/env python3
# -*- coding: utf-8-*-
if __name__ == '__main__':
    l = int(input())
    n = int(input())
    w = list(map(int, input().split(" ")))
    w.sort()
    s = 0
    for i in range(n):
        s += w[i]
        if l < s:
            print(i)
            exit()
    print(n)