장난꾸러기 문제

import java.util.Scanner;

public class Main {
    public String solution(int n, int[] arr) {
        StringBuilder sb = new StringBuilder();
        boolean found = false;
        int idx = 0;

        for (int i = 0; i < n - 1; i++) {
            if (arr[i] > arr[i + 1]) {
                idx = i;
                sb.append((idx + 1));
                sb.append(" ");
                break;
            }
        }
        for (int i = idx + 1; i < n - 1; i++) {
            if (arr[i] > arr[i + 1]) {
                sb.append((i + 1) + 1);
                found = true;
                break;
            }
        }
        if (!found)
            sb.append((idx + 1) + 1);
        return (sb.toString().trim());
    }

    public static void main(String[] args) {
        Main T = new Main();
        Scanner kb = new Scanner(System.in);
        int n = kb.nextInt();
        int[] arr = new int[n];
        for (int i = 0; i < n; i++) {
            arr[i] = kb.nextInt();
        }
        System.out.println(T.solution(n, arr));

    }

}

왜 틀렸늦지 모르겠습니다.