--- exercises/097_bit_manipulation.zig	2023-10-03 22:15:22.125574535 +0200
+++ answers/097_bit_manipulation.zig	2023-10-05 20:04:07.282771124 +0200
@@ -80,7 +80,7 @@
     y ^= x;
 
     // What must be written here?
-    ???;
+    x ^= y;
 
     print("x = {d}; y = {d}\n", .{ x, y });
 }