feat: add solutions to lc problem: No.1394

Author: thinkasany

solution/1300-1399/1394.Find Lucky Integer in an Array/README.md

@@ -170,6 +170,24 @@ class Solution {
 }
 ```
 
+### **TypeScript**
+
+```ts
+function findLucky(arr: number[]): number {
+    const cnt = new Array(510).fill(0);
+    for (const x of arr) {
+        ++cnt[x];
+    }
+    let ans = -1;
+    for (let x = 1; x < cnt.length; ++x) {
+        if (cnt[x] === x) {
+            ans = x;
+        }
+    }
+    return ans;
+}
+```
+
 ### **...**
 
 ```

solution/1300-1399/1394.Find Lucky Integer in an Array/README_EN.md

@@ -140,6 +140,24 @@ class Solution {
 }
 ```
 
+### **TypeScript**
+
+```ts
+function findLucky(arr: number[]): number {
+    const cnt = new Array(510).fill(0);
+    for (const x of arr) {
+        ++cnt[x];
+    }
+    let ans = -1;
+    for (let x = 1; x < cnt.length; ++x) {
+        if (cnt[x] === x) {
+            ans = x;
+        }
+    }
+    return ans;
+}
+```
+
 ### **...**
 
 ```

solution/1300-1399/1394.Find Lucky Integer in an Array/Solution.ts

@@ -0,0 +1,13 @@
+function findLucky(arr: number[]): number {
+    const cnt = new Array(510).fill(0);
+    for (const x of arr) {
+        ++cnt[x];
+    }
+    let ans = -1;
+    for (let x = 1; x < cnt.length; ++x) {
+        if (cnt[x] === x) {
+            ans = x;
+        }
+    }
+    return ans;
+}