import java.util.Arrays;

public class ExponentialSearch {
    public static void main(String[] args) {
        int[] arr = { 6, 12, 18, 24, 32 };
        int length = arr.length;
        int value = 18;
        int outcome = exponentialSearch(arr, length, value);

        if (outcome < 0) {
            System.out.println("Element is not present in the array");
        } else {
            System.out.println("Element is present in the array at index: " + outcome);
        }
    }

    public static int exponentialSearch(int[] arr, int length, int value) {
        if (arr[0] == value) {
            return 0;
        }
        int i = 1;
        while (i < length && arr[i] <= value) {
            i = i * 2;
        }
        return Arrays.binarySearch(arr, i / 2, Math.min(i, length), value);
    }
}