PowerString | Topcoder Archive

Problem Statement

å¯¹äºç»å®çåç¬¦ä¸²ï¼è¿åææâ*âåç¬¦çè½éåã

Definition

Class:: PowerString
Method:: power
Parameters:: String
Returns:: int
Method signature:: int power(String s)
(be sure your method is public)

Constraints

s å°å å«1~50ä¸ªåç¬¦
s ä¸åªå¯è½å æ¬åç¬¦â*â, â+â, âaâ-âzâ (æ³¨æé½æ¯å°å)

Examples

```
"+**"
```
```
Returns: 2
```
å¯¹åº*å·çå¾åä¸º1+1=2.
```
"fd+*fd"
```
```
Returns: 1
```
å¯¹åº*å·çå¾åä¸º1
```
"*+*+*+*+*"
```
```
Returns: 10
```
å¯¹åº*å·çå¾åä¸º 0+1+2+3+4=10.
```
"+a*b+c+*d*+f*g"
```
```
Returns: 11
```
```
"abcdefgh"
```
```
Returns: 0
```
æ²¡æ*å·.

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