HDOJ1157Who's in the Middle

Who's in the Middle

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 20228    Accepted Submission(s): 8883

Problem Description

FJ is surveying his herd to find the most average cow. He wants to know how much milk this 'median' cow gives: half of the cows give as much or more than the median; half give as much or less.

Given an odd number of cows N (1 <= N < 10,000) and their milk output (1..1,000,000), find the median amount of milk given such that at least half the cows give the same amount of milk or more and at least half give the same or less.

Input

* Line 1: A single integer N

* Lines 2..N+1: Each line contains a single integer that is the milk output of one cow.

Output

* Line 1: A single integer that is the median milk output.

Sample Input

5 2 4 1 3 5

Sample Output

Hint

求中位数

import java.util.Arrays;
import java.util.Scanner;

//求中位数
public class Main{
  private static Scanner scanner;

  public static void main(String[] args) {
    scanner = new Scanner(System.in);
    while (scanner.hasNext()) {
      int n = scanner.nextInt();
      int arr[] = new int[n];
      for (int i = 0; i < n; i++) {
        arr[i] = scanner.nextInt();
      }
      Arrays.sort(arr);
      int cen = 0;
      cen = arr[n / 2];
      System.out.println(cen);
    }
  }
}