house-robber-ii solution (ts)

Author: hi-rachel

house-robber-ii/hi-rachel.ts

@@ -0,0 +1,20 @@
+function rob(nums: number[]): number {
+  if (nums.length === 1) return nums[0];
+  if (nums.length === 2) return Math.max(nums[0], nums[1]);
+
+  function rob_linear(nums: number[]): number {
+    const size = nums.length;
+    const dp = new Array(size).fill(0);
+    dp[0] = nums[0];
+    dp[1] = Math.max(nums[0], nums[1]);
+    for (let i = 2; i < size; i++) {
+      dp[i] = Math.max(nums[i] + dp[i - 2], dp[i - 1]);
+    }
+    return dp[dp.length - 1];
+  }
+
+  return Math.max(
+    rob_linear(nums.slice(0, nums.length - 1)),
+    rob_linear(nums.slice(1))
+  );
+}