kt: add «1574. Shortest Subarray to be Removed to Make Array Sorted»

URL:	https://leetcode.com/problems/shortest-subarray-to-be-removed-to-make-array-sorted/
Signed-off-by: Matej Focko <me@mfocko.xyz>

kt/shortest-subarray-to-be-removed-to-make-array-sorted.kt

@@ -0,0 +1,22 @@
+class Solution {
+    fun findLengthOfShortestSubarray(arr: IntArray): Int {
+        var (left, right) = 0 to arr.size - 1
+
+        // shift ‹right› while ensorted
+        while (right > 0 && arr[right] >= arr[right - 1]) {
+            right -= 1
+        }
+
+        var shortest = right
+        while (left < right && (left < 1 || arr[left - 1] <= arr[left])) {
+            while (right < arr.size && arr[left] > arr[right]) {
+                right += 1
+            }
+
+            shortest = listOf(shortest, right - left - 1).min()
+            left += 1
+        }
+
+        return shortest
+    }
+}