2018/12/08 L1-042 日期格式化 Java

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {

    public static void main(String[] args) throws Exception{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String[] str = br.readLine().split("-");
        System.out.println(str[2]+"-"+str[0]+"-"+str[1]);
    }

}