백준 2920번: 음계

문제 출처: https://www.acmicpc.net/problem/2920

import java.io.BufferedReader;
import java.io.InputStreamReader;
 
public class Main {
    // https://www.acmicpc.net/source/7557796 코드 참고
    public static void main(String[] args) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String input = reader.readLine();
        
        if(input.equals("1 2 3 4 5 6 7 8"))
            System.out.println("ascending");
        else if(input.equals("8 7 6 5 4 3 2 1"))
            System.out.println("descending");
        else
            System.out.println("mixed");
    }
    // 다른 방법
    public static void sound(String input){
        String[] arr = input.split(" ");
        
        if(arr[0].equals("1")){
            for(int i=2 ; i<=8 ; i++){
                if(!arr[i-1].equals(String.valueOf(i))){
                    System.out.println("mixed");
                    return;
                }
            }
            System.out.println("ascending");
        }
        else if(arr[0].equals("8")) {
            for(int i=2, j=7 ; i<=8 ; i++, j--){
                if(!arr[i-1].equals(String.valueOf(j))){
                    System.out.println("mixed");
                    return;
                }
            }
            System.out.println("descending");
        }
        else {
            System.out.println("mixed");
        }
    }
}