Create index.ts

Author: masx200

beautiful-arrangement-ii/index.ts

@@ -0,0 +1,18 @@
+export default function constructArray(n: number, k: number): number[] {
+
+    const answer: number[] = new Array(n).fill(0);
+    let idx = 0;
+    for (let i = 1; i < n - k; ++i) {
+        answer[idx] = i;
+        ++idx;
+    }
+    for (let i = n - k, j = n; i <= j; ++i, --j) {
+        answer[idx] = i;
+        ++idx;
+        if (i !== j) {
+            answer[idx] = j;
+            ++idx;
+        }
+    }
+    return answer;
+};