diff --git a/problems/0028.实现strStr.md b/problems/0028.实现strStr.md
index c23f5558..bbe5b80f 100644
--- a/problems/0028.实现strStr.md
+++ b/problems/0028.实现strStr.md
@@ -929,6 +929,83 @@ var strStr = function (haystack, needle) {
 };
 ```
 
+TypeScript版本：
+
+> 前缀表统一减一
+
+```typescript
+function strStr(haystack: string, needle: string): number {
+    function getNext(str: string): number[] {
+        let next: number[] = [];
+        let j: number = -1;
+        next[0] = j;
+        for (let i = 1, length = str.length; i < length; i++) {
+            while (j >= 0 && str[i] !== str[j + 1]) {
+                j = next[j];
+            }
+            if (str[i] === str[j + 1]) {
+                j++;
+            }
+            next[i] = j;
+        }
+        return next;
+    }
+    if (needle.length === 0) return 0;
+    let next: number[] = getNext(needle);
+    let j: number = -1;
+    for (let i = 0, length = haystack.length; i < length; i++) {
+        while (j >= 0 && haystack[i] !== needle[j + 1]) {
+            j = next[j];
+        }
+        if (haystack[i] === needle[j + 1]) {
+            if (j === needle.length - 2) {
+                return i - j - 1;
+            }
+            j++;
+        }
+    }
+    return -1;
+};
+```
+
+> 前缀表不减一
+
+```typescript
+// 不减一版本
+function strStr(haystack: string, needle: string): number {
+    function getNext(str: string): number[] {
+        let next: number[] = [];
+        let j: number = 0;
+        next[0] = j;
+        for (let i = 1, length = str.length; i < length; i++) {
+            while (j > 0 && str[i] !== str[j]) {
+                j = next[j - 1];
+            }
+            if (str[i] === str[j]) {
+                j++;
+            }
+            next[i] = j;
+        }
+        return next;
+    }
+    if (needle.length === 0) return 0;
+    let next: number[] = getNext(needle);
+    let j: number = 0;
+    for (let i = 0, length = haystack.length; i < length; i++) {
+        while (j > 0 && haystack[i] !== needle[j]) {
+            j = next[j - 1];
+        }
+        if (haystack[i] === needle[j]) {
+            if (j === needle.length - 1) {
+                return i - j;
+            }
+            j++;
+        }
+    }
+    return -1;
+}
+```
+
 Swift 版本
 
 > 前缀表统一减一
diff --git a/problems/链表理论基础.md b/problems/链表理论基础.md
index 109aa1ed..a4fefa2b 100644
--- a/problems/链表理论基础.md
+++ b/problems/链表理论基础.md
@@ -195,10 +195,20 @@ class ListNode {
 ```
 
 Python：
-
+```python
+class ListNode:
+    def __init__(self, val, next=None):
+        self.val = val
+        self.next = next
+```
 
 Go：
-
+```go
+type ListNode struct {
+    Val int
+    Next *ListNode
+}
+```