Merge pull request neetcode-gh#3170 from RaafatAkkad/patch-1

Fix integer overflow in java/0704-binary-search.java
qxzsilver1 · Dec 19, 2023 · d715a99 · d715a99
2 parents 8f72245 + bb0fa0c
commit d715a99
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/java/0704-binary-search.java b/java/0704-binary-search.java
@@ -5,7 +5,9 @@ public int search(int[] nums, int target) {
         int j = nums.length - 1;
 
         while (i <= j) {
-            int mid = (i + j) / 2;
+            // mid is calculated this way to prevent integer overflow.
+            // See: https://blog.research.google/2006/06/extra-extra-read-all-about-it-nearly.html
+            int mid = i + (j - i) / 2;
 
             if (nums[mid] == target) return mid; else if (
                 nums[mid] < target