diff --git a/LAB1/Makefile b/LAB1/Makefile
index 1ef6fcf..394275a 100644
--- a/LAB1/Makefile
+++ b/LAB1/Makefile
@@ -23,4 +23,11 @@ btestexplicit:
 clean:
 	rm -f *.o btest fshow ishow *~
 
+oneshoot:
+	make clean;	\
+	./dlc bits.c;	\
+	make btest;	\
+	./btest bits.c;	\
+	make clean	\
+
 
diff --git a/LAB1/bits.c b/LAB1/bits.c
index 8701616..5aa4981 100644
--- a/LAB1/bits.c
+++ b/LAB1/bits.c
@@ -281,7 +281,7 @@ int isLessOrEqual(int x, int y) {
  *   Rating: 4 
  */
 int logicalNeg(int x) {
-  return 2;
+  return ((x|(~x+1))>>31)+1;
 }
 /* howManyBits - return the minimum number of bits required to represent x in
  *             two's complement
diff --git a/README.md b/README.md
index dfd4736..ee7bc20 100644
--- a/README.md
+++ b/README.md
@@ -19,3 +19,7 @@ A CSAPP LAB
 4. Finish isAsciiDigit
 
 5. Finish isLessOrEqual
+
+6. Finish logicalNeg
+
+7. Update Makefile
\ No newline at end of file