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

def main():
    
    l = int(input())
    n = int(input())
    w = [int(i) for i in input().split(" ")]
    
    w.sort()
    
    result = 0
    for i in range(1, len(w) + 1):
        if l >= sum(w[:i]):
            result += 1
        else:
            break
    print(result)

if __name__ == '__main__':
    main()