diff --git a/3sum/sora0319.java b/3sum/sora0319.java
index 2685edef3..67aa23b14 100644
--- a/3sum/sora0319.java
+++ b/3sum/sora0319.java
@@ -35,3 +35,4 @@ public List<List<Integer>> threeSum(int[] nums) {
     }
 }
 
+
diff --git a/coin-change/sora0319.java b/coin-change/sora0319.java
index e161a8487..2a5bb820e 100644
--- a/coin-change/sora0319.java
+++ b/coin-change/sora0319.java
@@ -19,3 +19,4 @@ public int coinChange(int[] coins, int amount) {
 }
 
 
+
diff --git a/find-minimum-in-rotated-sorted-array/sora0319.java b/find-minimum-in-rotated-sorted-array/sora0319.java
index ce4999cec..1eadf09b8 100644
--- a/find-minimum-in-rotated-sorted-array/sora0319.java
+++ b/find-minimum-in-rotated-sorted-array/sora0319.java
@@ -19,3 +19,4 @@ public int findMin(int[] nums) {
     }
 }
 
+
diff --git a/maximum-depth-of-binary-tree/sora0319.java b/maximum-depth-of-binary-tree/sora0319.java
index ea1419c8b..31c4041c1 100644
--- a/maximum-depth-of-binary-tree/sora0319.java
+++ b/maximum-depth-of-binary-tree/sora0319.java
@@ -8,3 +8,4 @@ public int maxDepth(TreeNode root) {
     }
 }
 
+
diff --git a/merge-two-sorted-lists/sora0319.java b/merge-two-sorted-lists/sora0319.java
index 7366c2042..2d942abba 100644
--- a/merge-two-sorted-lists/sora0319.java
+++ b/merge-two-sorted-lists/sora0319.java
@@ -1,5 +1,4 @@
 /**
- * Definition for singly-linked list.
  * public class ListNode {
  *     int val;
  *     ListNode next;
@@ -38,3 +37,4 @@ public ListNode mergeTwoLists(ListNode list1, ListNode list2) {
     }
 }
 
+
diff --git a/product-of-array-except-self/sora0319.java b/product-of-array-except-self/sora0319.java
index c094dd3d4..68cc0b773 100644
--- a/product-of-array-except-self/sora0319.java
+++ b/product-of-array-except-self/sora0319.java
@@ -19,3 +19,4 @@ public int[] productExceptSelf(int[] nums) {
     }
 }
 
+
diff --git a/validate-binary-search-tree/sora0319.java b/validate-binary-search-tree/sora0319.java
index af9aa9104..b75985dbb 100644
--- a/validate-binary-search-tree/sora0319.java
+++ b/validate-binary-search-tree/sora0319.java
@@ -11,3 +11,4 @@ public boolean isvalid(TreeNode root,long min,long max)
     }
 }
 
+
diff --git a/word-search/sora0319.java b/word-search/sora0319.java
index 2c3a62aa7..9c0455706 100644
--- a/word-search/sora0319.java
+++ b/word-search/sora0319.java
@@ -40,3 +40,4 @@ public boolean checkingWord(char[][] board, String word, boolean[][] visited, in
     }
 }
 
+