package me.ramswaroop.arrays.searching;
/**
* Created by IntelliJ IDEA.
*
* @author: ramswaroop
* @date: 9/1/15
* @time: 4:57 PM
*/
public class InterpolationSearch {
/**
* @param a
* @param k
* @return
*/
public static int search(int[] a, int k) {
int low = 0, high = a.length - 1, mid;
while (a[low] != a[high] && k >= a[low] && k <= a[high]) {
mid = low + (k - a[low]) * (high - low) / a[high] - a[low];
if (k < a[mid]) {
high = mid - 1;
} else if (k > a[mid]) {
low = mid + 1;
} else {
return mid;
}
}
if (k == a[low]) {
return low;
} else {
return -1;
}
}
public static void main(String a[]) {
System.out.println(search(new int[]{0, 2}, 2));
System.out.println(search(new int[]{0, 1}, 2));
System.out.println(search(new int[]{0, 1, 2, 3}, 2));
System.out.println(search(new int[]{0, 1, 2, 3}, 3));
System.out.println(search(new int[]{0, 2}, 0));
System.out.println(search(new int[]{0, 1, 2, 2, 2, 3, 3}, 2));
}
}