feat: add ts solution to lc problem: No.0240.Search a 2D Matrix II (doocs#501)

Author: zhaocchen

solution/0200-0299/0240.Search a 2D Matrix II/README.md

@@ -95,6 +95,25 @@ class Solution {
 }
 ```
 
+### **TypeScript**
+
+```ts
+function searchMatrix(matrix: number[][], target: number): boolean {
+    let m = matrix.length, n = matrix[0].length;
+    let i = m - 1, j = 0;
+    while (i >= 0 && j < n) {
+        let cur = matrix[i][j];
+        if (cur == target) return true;
+        if (cur > target) {
+            --i;
+        } else {
+            ++j;
+        }
+    }
+    return false;
+};
+```
+
 ### **C++**
 
 ```cpp

solution/0200-0299/0240.Search a 2D Matrix II/README_EN.md

@@ -83,6 +83,25 @@ class Solution {
 }
 ```
 
+### **TypeScript**
+
+```ts
+function searchMatrix(matrix: number[][], target: number): boolean {
+    let m = matrix.length, n = matrix[0].length;
+    let i = m - 1, j = 0;
+    while (i >= 0 && j < n) {
+        let cur = matrix[i][j];
+        if (cur == target) return true;
+        if (cur > target) {
+            --i;
+        } else {
+            ++j;
+        }
+    }
+    return false;
+};
+```
+
 ### **C++**
 
 ```cpp

solution/0200-0299/0240.Search a 2D Matrix II/Solution.ts

@@ -0,0 +1,14 @@
+function searchMatrix(matrix: number[][], target: number): boolean {
+    let m = matrix.length, n = matrix[0].length;
+    let i = m - 1, j = 0;
+    while (i >= 0 && j < n) {
+        let cur = matrix[i][j];
+        if (cur == target) return true;
+        if (cur > target) {
+            --i;
+        } else {
+            ++j;
+        }
+    }
+    return false;
+};