diff --git a/src/main/kotlin/p27xx/Problem2717.kt b/src/main/kotlin/p27xx/Problem2717.kt
new file mode 100644
index 00000000..3644cb6f
--- /dev/null
+++ b/src/main/kotlin/p27xx/Problem2717.kt
@@ -0,0 +1,27 @@
+package p27xx
+
+import util.expect
+
+fun main() {
+    class Solution {
+        fun semiOrderedPermutation(nums: IntArray): Int {
+            var oneIndex = 0
+            var nIndex = 0
+
+            nums.forEachIndexed { index, num ->
+                when (num) {
+                    1 -> oneIndex = index
+                    nums.size -> nIndex = index
+                }
+            }
+
+            return oneIndex + nums.lastIndex - nIndex - if (oneIndex > nIndex) 1 else 0
+        }
+    }
+
+    expect {
+        Solution().semiOrderedPermutation(
+            intArrayOf()
+        )
+    }
+}