Create 0162-find-peak-element.kt

Author: a93a

kotlin/0162-find-peak-element.kt

@@ -0,0 +1,19 @@
+class Solution {
+    fun findPeakElement(nums: IntArray): Int {
+        var left = 0
+        var right = nums.lastIndex
+        var mid = -1
+
+        while(left <= right) {
+            mid = left + (right - left) / 2       
+            if(mid > 0 && nums[mid] < nums[mid - 1])
+                right = mid - 1
+            else if(mid < nums.lastIndex && nums[mid] < nums[mid + 1])
+                left = mid + 1
+            else
+                break
+        }
+
+        return mid
+    }
+}