# -*- coding: utf-8 -*-

if __name__ == '__main__':
    l = int(input())
    n = int(input())
    w = list(map(int, input().split()))

    w.sort()
    breadth_sum = 0
    counter = 0
    for block in w:
        if breadth_sum + block <= l:
            breadth_sum += block
            counter += 1
        else:
            break
    
    print(counter)