diff --git a/01_datalab/bits.c b/01_datalab/bits.c
index 7187032..d2ae6bf 100644
--- a/01_datalab/bits.c
+++ b/01_datalab/bits.c
@@ -1,7 +1,7 @@
 /* 
  * CSE4009 Assignment 1 - Data Lab 
  * 
- * <Please put your name and userid here>
+ * name: Hajin Ju, id: 2024062806
  * 
  * bits.c - Source file with your solutions to the Lab.
  *          This is the file you will hand in to your instructor.
@@ -132,7 +132,6 @@ NOTES:
  *      the correct answers.
  */
 
-
 #endif
 /* Copyright (C) 1991-2020 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
@@ -178,7 +177,7 @@ NOTES:
  *   Rating: 1
  */
 int bitAnd(int x, int y) {
-  return 2;
+    return ~(~x | ~y);
 }
 /* 
  * bitXor - x^y using only ~ and & 
@@ -188,7 +187,7 @@ int bitAnd(int x, int y) {
  *   Rating: 1
  */
 int bitXor(int x, int y) {
-  return 2;
+    return x & ~y | ~x & y;
 }
 /*
  * isTmin - returns 1 if x is the minimum, two's complement number,
@@ -198,7 +197,7 @@ int bitXor(int x, int y) {
  *   Rating: 1
  */
 int isTmin(int x) {
-  return 2;
+    return !!x & !(x ^ (~x + 1)); 
 }
 //2
 /* 
@@ -209,7 +208,7 @@ int isTmin(int x) {
  *   Rating: 2
  */
 int isEqual(int x, int y) {
-  return 2;
+    
 }
 /* 
  * negate - return -x 
@@ -219,7 +218,7 @@ int isEqual(int x, int y) {
  *   Rating: 2
  */
 int negate(int x) {
-  return 2;
+    return ~x + 1;
 }
 /* 
  * getByte - Extract byte n from word x
@@ -230,7 +229,7 @@ int negate(int x) {
  *   Rating: 2
  */
 int getByte(int x, int n) {
-  return 2;
+    return 2;
 }
 //3
 /* 
@@ -241,7 +240,7 @@ int getByte(int x, int n) {
  *   Rating: 3
  */
 int isLess(int x, int y) {
-  return 2;
+    return 2;
 }
 /* 
  * conditional - same as x ? y : z 
@@ -251,7 +250,7 @@ int isLess(int x, int y) {
  *   Rating: 3
  */
 int conditional(int x, int y, int z) {
-  return 2;
+    return 2;
 }
 //4
 /* 
@@ -266,7 +265,7 @@ int conditional(int x, int y, int z) {
  *   Rating: 4
  */
 unsigned floatScale2(unsigned uf) {
-  return 2;
+    return 2;
 }
 /* 
  * floatFloat2Int - Return bit-level equivalent of expression (int) f
@@ -281,5 +280,5 @@ unsigned floatScale2(unsigned uf) {
  *   Rating: 4
  */
 int floatFloat2Int(unsigned uf) {
-  return 2;
+    return 2;
 }