Merge pull request #116 from 1-SubhamSingh/TernarySearch

Added Ternary Search Program

TernarySearch.java

@@ -0,0 +1,69 @@
+import java.util.Scanner;
+
+public class TernarySearch {
+
+    // Function to perform ternary search on a sorted array
+    public static int ternarySearch(int[] arr, int left, int right, int key) {
+        if (right >= left) {
+            // Find the two mid points
+            int mid1 = left + (right - left) / 3;
+            int mid2 = right - (right - left) / 3;
+
+            // Check if key is at any mid
+            if (arr[mid1] == key) {
+                return mid1;
+            }
+            if (arr[mid2] == key) {
+                return mid2;
+            }
+
+            // Key lies in left one-third
+            if (key < arr[mid1]) {
+                return ternarySearch(arr, left, mid1 - 1, key);
+            }
+            // Key lies in right one-third
+            else if (key > arr[mid2]) {
+                return ternarySearch(arr, mid2 + 1, right, key);
+            }
+            // Key lies in middle one-third
+            else {
+                return ternarySearch(arr, mid1 + 1, mid2 - 1, key);
+            }
+        }
+
+        // Key not found
+        return -1;
+    }
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        // Taking array input
+        System.out.print("Enter the number of elements in the array: ");
+        int n = scanner.nextInt();
+
+        int[] arr = new int[n];
+        System.out.println("Enter the elements of the array in sorted order:");
+        for (int i = 0; i < n; i++) {
+            arr[i] = scanner.nextInt();
+        }
+
+        // Taking the key input
+        System.out.print("Enter the element to search for: ");
+        int key = scanner.nextInt();
+
+        // Performing ternary search
+        int result = ternarySearch(arr, 0, arr.length - 1, key);
+
+        if (result != -1) {
+            System.out.println("Element found at index: " + result);
+        } else {
+            System.out.println("Element not found in the array.");
+        }
+
+        scanner.close();
+    }
+}
+
+
+