add Search in Rotated Sorted Array solution

Author: HoonDongKang

search-in-rotated-sorted-array/HoonDongKang.ts

@@ -0,0 +1,32 @@
+/**
+ * [Problem]: [33] Search in Rotated Sorted Array
+ * (https://leetcode.com/problems/search-in-rotated-sorted-array/description/)
+ */
+function search(nums: number[], target: number): number {
+    //시간복잡도 O(log n)
+    //공간복잡도 O(1)
+    let left = 0;
+    let right = nums.length - 1;
+
+    while (left <= right) {
+        let mid = Math.floor((left + right) / 2);
+
+        if (nums[mid] === target) return mid;
+
+        if (nums[left] <= nums[mid]) {
+            if (nums[left] <= target && target < nums[mid]) {
+                right = mid - 1;
+            } else {
+                left = mid + 1;
+            }
+        } else {
+            if (nums[mid] < target && target <= nums[right]) {
+                left = mid + 1;
+            } else {
+                right = mid - 1;
+            }
+        }
+    }
+
+    return -1;
+}