diff --git a/src/main/java/com/cool/ling_cha_mount/bit/Num3226.java b/src/main/java/com/cool/ling_cha_mount/bit/Num3226.java
new file mode 100644
index 0000000..486a995
--- /dev/null
+++ b/src/main/java/com/cool/ling_cha_mount/bit/Num3226.java
@@ -0,0 +1,7 @@
+package com.cool.ling_cha_mount.bit;
+
+public class Num3226 {
+    public int minChanges(int n, int k) {
+        return (n | k) != n ? -1 : Integer.bitCount(n ^ k);
+    }
+}