refactor 556

Author: fishercoder1534

src/main/java/com/fishercoder/solutions/_556.java

@@ -1,13 +1,15 @@
 package com.fishercoder.solutions;
 
 /**
+ * 556. Next Greater Element III
+ *
  * Given a positive 32-bit integer n, you need to find the smallest 32-bit integer which has exactly the same digits existing
  * in the integer n and is greater in value than n. If no such positive 32-bit integer exists, you need to return -1.
- * <p>
+ *
  * Example 1:
  * Input: 12
  * Output: 21
- * <p>
+ *
  * Example 2:
  * Input: 21
  * Output: -1