--- exercises/064_builtins.zig	2023-10-03 22:15:22.125574535 +0200
+++ answers/064_builtins.zig	2023-10-05 20:04:07.132768316 +0200
@@ -63,7 +63,7 @@
     //
     // If there was no overflow at all while adding 5 to a, what value would
     // 'my_result' hold? Write the answer in into 'expected_result'.
-    const expected_result: u8 = ???;
+    const expected_result: u8 = 0b00010010;
     print(". Without overflow: {b:0>8}. ", .{expected_result});
 
     print("Furthermore, ", .{});
@@ -78,6 +78,6 @@
     // Now it's your turn. See if you can fix this attempt to use
     // this builtin to reverse the bits of a u8 integer.
     const input: u8 = 0b11110000;
-    const tupni: u8 = @bitReverse(input, tupni);
+    const tupni: u8 = @bitReverse(input);
     print("{b:0>8} backwards is {b:0>8}.\n", .{ input, tupni });
 }