输入一个整数n，输出n行。例如输入1，输出1；输入2，输出1\n 1 2；输入3，输出1\n 1 2\n 1 2 3

def shuchu(num):
    for i in range(num):
        for j in range(i + 1):
            print(j + 1, end="")
        print("")


shuchu(8)