ChangeDigit | Topcoder Archive

Problem Statement

Definition

Class:: ChangeDigit
Method:: change
Parameters:: int
Returns:: int
Method signature:: int change(int n)
(be sure your method is public)

Constraints

n ä¸ä¸ª1å°1,000,000,000 ä¹é´æ£æ´æ°ã

Examples

```
123
```
```
Returns: 122
```
ä¿®æ¹äºå ¶ä¸ä¸ä½ä»¥å, æä»¬å¯ä»¥å¾å°å¦ä¸ä¸äºå°äºnçæ°: 023, 103, 113, 120, 121, å 122. å ¶ä¸æå¤§çæ°æ¯ 122ã
```
94040
```
```
Returns: 94030
```
```
999999999
```
```
Returns: 999999998
```
```
1000000000
```
```
Returns: 0
```
å¨è¿ä¸ªæ ·ä¾ä¸, æä»¬åªæä¸ç§ä¿®æ¹æ¹æ¡ï¼å³å°é¦ä½ç '1' æ¿æ¢æ '0' ä»¥å¾å° "0000000000", è¿æ¯ä¸ä¸ªåè¿å¶è¡¨ç¤ºç0 (æ9ä¸ªåå¯¼0)ã
```
4321000
```
```
Returns: 4320000
```

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