refactor 677

Author: fishercoder1534

src/main/java/com/fishercoder/solutions/_677.java

@@ -3,24 +3,6 @@
 import java.util.HashMap;
 import java.util.Map;
 
-/**
- * 677. Map Sum Pairs
- *
- * Implement a MapSum class with insert, and sum methods.
- *
- * For the method insert, you'll be given a pair of (string, integer).
- * The string represents the key and the integer represents the value.
- * If the key already existed, then the original key-value pair will be overridden to the new one.
- *
- * For the method sum, you'll be given a string representing the prefix,
- * and you need to return the sum of all the pairs' value whose key starts with the prefix.
- *
- * Example 1:
- * Input: insert("apple", 3), Output: Null
- * Input: sum("ap"), Output: 3
- * Input: insert("app", 2), Output: Null
- * Input: sum("ap"), Output: 5
- */
 public class _677 {
     public static class Solution1 {