diff --git a/31 May  Swap two nibbles in a byte b/31 May  Swap two nibbles in a byte
new file mode 100644
index 0000000..731dc66
--- /dev/null
+++ b/31 May  Swap two nibbles in a byte	
@@ -0,0 +1,7 @@
+class Solution {
+  public:
+    int swapNibbles(int n) {
+        // code here
+        return (((n&15)<<4)|(n>>4));
+    }
+};