update kama55.右旋字符串.md python 切片法

problems/kama55.右旋字符串.md

@@ -222,6 +222,13 @@ s = s[len(s)-k:] + s[:len(s)-k]
 print(s)
 ```
 
+```Python 切片法
+k = int(input())
+s = input()
+
+print(s[-k:] + s[:-k])
+```
+
 ### Go：
 ```go
 package main