添加（1143.最长公共子序列.md）：增加typescript版本

problems/1143.最长公共子序列.md

@@ -236,6 +236,32 @@ const longestCommonSubsequence = (text1, text2) => {
 };
 ```
 
+TypeScript:
+
+```typescript
+function longestCommonSubsequence(text1: string, text2: string): number {
+    /**
+        dp[i][j]: text1中前i-1个和text2中前j-1个，最长公共子序列的长度
+     */
+    const length1: number = text1.length,
+        length2: number = text2.length;
+    const dp: number[][] = new Array(length1 + 1).fill(0)
+        .map(_ => new Array(length2 + 1).fill(0));
+    for (let i = 1; i <= length1; i++) {
+        for (let j = 1; j <= length2; j++) {
+            if (text1[i - 1] === text2[j - 1]) {
+                dp[i][j] = dp[i - 1][j - 1] + 1;
+            } else {
+                dp[i][j] = Math.max(dp[i][j - 1], dp[i - 1][j]);
+            }
+        }
+    }
+    return dp[length1][length2];
+};
+```
+
+
+
 
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