数字1~9组合幂（拓展02-输入一个正整数，倒序输出每一个数字）
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Background
Description
输入一个正整数，倒序输出每一个数字
Format
Input
Output
Samples
123456789
9
8
7
6
5
4
3
2
1
123355778
8
7
7
5
5
3
3
2
1
10230190
0
9
1
0
3
2
0
1
Limitation
1s, 1024KiB for each test case.
