[브론즈 III] 2997번 :: 네 번째 수 / Java

 

 

 

 

문제

https://www.acmicpc.net/problem/2997

2997번: 네 번째 수

 

 

 

 

 

코드

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.StringTokenizer;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int[] arr = new int[3]; 
		StringTokenizer st = new StringTokenizer(br.readLine());
		arr[0] = Integer.parseInt(st.nextToken());
		arr[1] = Integer.parseInt(st.nextToken());
		arr[2] = Integer.parseInt(st.nextToken());

        Arrays.sort(arr);

        int x = arr[1] - arr[0];
        int y = arr[2] - arr[1];

        if(x == y) {
            System.out.println(arr[2] + x);
        } else if(x < y) {
            System.out.println(arr[1] + x);
        } else {
            System.out.println(arr[0] + y);
        }
    }
}