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

def main():
    L = int(input())
    N = int(input())
    W = [int(w) for w in input().split()]

    length = 0
    count = 0    
    W = sorted(W)

    for w in W:
        if (length + w) <= L:
            count += 1
            length += w
        else:
            break
    
    print(count)

if __name__ == '__main__':
    main()