update

Author: yennanliu

leetcode_java/src/main/java/LeetCodeJava/HashTable/SubarraySumEqualsK.java

@@ -89,7 +89,7 @@ public int subarraySum(int[] nums, int k) {
          *
          *
          *  Purpose of map.put(0, 1);
-         *  
+         *
          * 	1.	Handle the Initial Case:
          * 	    •	The prefix sum presum starts at 0 before any elements of the array are processed.
          * 	    •	Adding map.put(0, 1) ensures that if a subarray’s prefix sum equals k (e.g., the subarray itself equals  k ), it is counted correctly.

leetcode_java/src/main/java/dev/copilotTest1.java

@@ -0,0 +1,47 @@
+package dev;
+
+public class copilotTest1 {
+    public static void main(String[] args) {
+        // offer a for loop from 1 to 10
+        for (int i = 1; i <= 10; i++) {
+            // print the value of i
+            System.out.println(i);
+        }
+
+        // offer a for loop from 10 to 1
+        for (int i = 10; i >= 1; i--) {
+            // print the value of i
+            System.out.println(i);
+        }
+
+        // offer a for loop from 1 to 10
+        for (int i = 1; i <= 10; i++) {
+            // print the value of i
+            System.out.println(i);
+        }
+
+        // offer a for loop from -1 to -10
+        for (int i = -1; i >= -10; i--) {
+            // print the value of i
+            System.out.println(i);
+        }
+
+        // offer a binrary search implementation
+        int[] arr = {1, 2, 3, 4, 5, 6, 7, 8, 9};
+        int target = 5;
+        int left = 0;
+        int right = arr.length - 1;
+        while (left <= right) {
+            int mid = left + (right - left) / 2;
+            if (arr[mid] == target) {
+                System.out.println("Found at index " + mid);
+                break;
+            } else if (arr[mid] < target) {
+                left = mid + 1;
+            } else {
+                right = mid - 1;
+            }
+        }
+
+    }
+}