feat: add typescript solution to lc problem: No.1456

No.1456.Maximum Number of Vowels in a Substring of Given Length

Author: zhaocchen

solution/1400-1499/1456.Maximum Number of Vowels in a Substring of Given Length/README.md

@@ -80,6 +80,26 @@
 
 ```
 
+### **TypeScript**
+
+```ts
+function maxVowels(s: string, k: number): number {
+    const n = s.length;
+    let ans = 0;
+    let preSum = new Array(n).fill(0);
+    let cnt = 0;
+    for (let i = 0; i < n && ans != k; i++) {
+        let char = s.charAt(i);
+        if (['a', 'e', 'i', 'o', 'u'].includes(char)) {
+            cnt++;
+        }
+        preSum[i] = cnt;
+        ans = Math.max(i < k ? cnt : preSum[i] - preSum[i - k], ans);
+    }
+    return ans;
+};
+```
+
 ### **...**
 
 ```

solution/1400-1499/1456.Maximum Number of Vowels in a Substring of Given Length/README_EN.md

@@ -96,6 +96,26 @@
 
 ```
 
+### **TypeScript**
+
+```ts
+function maxVowels(s: string, k: number): number {
+    const n = s.length;
+    let ans = 0;
+    let preSum = new Array(n).fill(0);
+    let cnt = 0;
+    for (let i = 0; i < n && ans != k; i++) {
+        let char = s.charAt(i);
+        if (['a', 'e', 'i', 'o', 'u'].includes(char)) {
+            cnt++;
+        }
+        preSum[i] = cnt;
+        ans = Math.max(i < k ? cnt : preSum[i] - preSum[i - k], ans);
+    }
+    return ans;
+};
+```
+
 ### **...**
 
 ```

solution/1400-1499/1456.Maximum Number of Vowels in a Substring of Given Length/Solution.ts

@@ -0,0 +1,15 @@
+function maxVowels(s: string, k: number): number {
+    const n = s.length;
+    let ans = 0;
+    let preSum = new Array(n).fill(0);
+    let cnt = 0;
+    for (let i = 0; i < n && ans != k; i++) {
+        let char = s.charAt(i);
+        if (['a', 'e', 'i', 'o', 'u'].includes(char)) {
+            cnt++;
+        }
+        preSum[i] = cnt;
+        ans = Math.max(i < k ? cnt : preSum[i] - preSum[i - k], ans);
+    }
+    return ans;
+};