diff --git a/LAB1/bits.c b/LAB1/bits.c
index 7006127..1ef38e4 100644
--- a/LAB1/bits.c
+++ b/LAB1/bits.c
@@ -214,7 +214,8 @@ int isTmax(int x) {
  *   Rating: 2
  */
 int allOddBits(int x) {
-  return 2;
+  int a = 0xaaaaaaaa;
+  return !((a&x)^a);
 }
 /* 
  * negate - return -x 
diff --git a/README.md b/README.md
index ed31e29..d7e86ba 100644
--- a/README.md
+++ b/README.md
@@ -9,3 +9,7 @@ A CSAPP LAB
 
 3. Finish tmin
 
+### 2023/10/8 Update：
+1. Finish isTmax
+
+2. Finish allOddBits