diff --git a/kt/minimum-array-end.kt b/kt/minimum-array-end.kt
new file mode 100644
index 0000000..bcad6a8
--- /dev/null
+++ b/kt/minimum-array-end.kt
@@ -0,0 +1,22 @@
+class Solution {
+    private data class State(val result: Long, val n: Long) {
+        fun update(
+            target: Long,
+            mask: Long,
+        ): State =
+            when {
+                n > 0 && mask.and(target) == 0L -> State(result.or((n.and(1L)) * mask), n.shr(1))
+                else -> this
+            }
+    }
+
+    fun minEnd(
+        n: Int,
+        x: Int,
+    ): Long =
+        (0..Long.SIZE_BITS)
+            .map { 1L.shl(it) }
+            .fold(State(x.toLong(), n - 1L)) { s, mask ->
+                s.update(x.toLong(), mask)
+            }.result
+}