diff --git a/src/main/java/com/bytelegend/Challenge.java b/src/main/java/com/bytelegend/Challenge.java
index aec44f0..20239d5 100644
--- a/src/main/java/com/bytelegend/Challenge.java
+++ b/src/main/java/com/bytelegend/Challenge.java
@@ -17,7 +17,7 @@ public static void main(String[] args) {
      * (`+`).
      */
     public static int multiplyBy31(int n) {
-        return (n << 5) - n;
+        return 0;
     }
 
     /**
@@ -32,6 +32,6 @@ public static int multiplyBy31(int n) {
      * addition sign (`+`).
      */
     public static int divideBy2ThenMinus1(int n) {
-        return n >= 0 ? (n >> 1) - 1 : (n - 1) >> 1;
+        return 0;
     }
 }