feat: 153. Find Minimum in Rotated Sorted Array

Author: gwbaik9717

find-minimum-in-rotated-sorted-array/gwbaik9717.js

@@ -0,0 +1,32 @@
+// Time complexity: O(logn)
+// Space complexity: O(1)
+
+/**
+ * @param {number[]} nums
+ * @return {number}
+ */
+var findMin = function (nums) {
+  let left = 0;
+  let right = nums.length - 1;
+
+  while (left < right) {
+    const mid = Math.floor((left + right) / 2);
+
+    if (nums.at(mid - 1) > nums.at(mid)) {
+      return nums[mid];
+    }
+
+    if (nums.at(mid + 1) < nums.at(mid)) {
+      return nums[mid + 1];
+    }
+
+    if (nums.at(mid + 1) > nums.at(right)) {
+      left = mid + 1;
+      continue;
+    }
+
+    right = mid - 1;
+  }
+
+  return nums[left];
+};