package Maths;

import java.util.Arrays;

/** Wikipedia: https://en.wikipedia.org/wiki/Median */
public class Median {
 public static void main(String[] args) {
 assert median(new int[] {0}) == 0;
 assert median(new int[] {1, 2}) == 1.5;
 assert median(new int[] {4, 1, 3, 2}) == 2.5;
 assert median(new int[] {1, 3, 3, 6, 7, 8, 9}) == 6;
 assert median(new int[] {1, 2, 3, 4, 5, 6, 8, 9}) == 4.5;
 }

 /**
 * Calculate average median
 *
 * @param values number series
 * @return median of given {@code values}
 */
 public static double median(int[] values) {
 Arrays.sort(values);
 int length = values.length;
 return length % 2 == 0
 ? (values[length / 2] + values[length / 2 - 1]) / 2.0
 : values[length / 2];
 }
}