def main():
    L = int(input())
    N = int(input())
    W = [int(x) for x in input().split()]
    W.sort()
    w = 0
    cnt = 0
    for i in range(N):
        if w+W[i] > L:
            print(i)
            exit()
        else:
            w += W[i]
    print(N)
    
if __name__ == '__main__':
    main()