feat: add typescript solution to lc problem: No.2320

No.2320.Count Number of Ways to Place Houses

Author: zhaocchen

solution/2300-2399/2320.Count Number of Ways to Place Houses/README.md

@@ -127,7 +127,14 @@ func countHousePlacements(n int) int {
 ### **TypeScript**
 
 ```ts
-
+function countHousePlacements(n: number): number {
+    const mod = BigInt(10 ** 9 + 7);
+    let pre = 1n, count = 2n;
+    for (let i = 2; i <= n; i++) {
+        [count, pre] = [(count + pre) % mod, count];
+    }
+    return Number(count ** 2n % mod);
+};
 ```
 
 ### **...**

solution/2300-2399/2320.Count Number of Ways to Place Houses/README_EN.md

@@ -118,7 +118,14 @@ func countHousePlacements(n int) int {
 ### **TypeScript**
 
 ```ts
-
+function countHousePlacements(n: number): number {
+    const mod = BigInt(10 ** 9 + 7);
+    let pre = 1n, count = 2n;
+    for (let i = 2; i <= n; i++) {
+        [count, pre] = [(count + pre) % mod, count];
+    }
+    return Number(count ** 2n % mod);
+};
 ```
 
 ### **...**

solution/2300-2399/2320.Count Number of Ways to Place Houses/Solution.ts

@@ -0,0 +1,8 @@
+function countHousePlacements(n: number): number {
+    const mod = BigInt(10 ** 9 + 7);
+    let pre = 1n, count = 2n;
+    for (let i = 2; i <= n; i++) {
+        [count, pre] = [(count + pre) % mod, count];
+    }
+    return Number(count ** 2n % mod);
+};