题解 | #MP3光标位置#

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while (in.hasNextLine()) {
            int n = Integer.parseInt(in.nextLine());
            String list = in.nextLine();
            int index = 1;
            int pageIndex = 1;
            int pageSize;
            if (n >= 4) {
                pageSize = 4;
            } else {
                pageSize = n;
            }
            for (int i = 0; i < list.length(); i++) {
                switch (list.charAt(i)) {
                    case 'U':
                        if (index == 1) {
                            index = n;
                            pageIndex = pageSize;
                        } else {
                            index--;
                            if (pageIndex != 1) {
                                pageIndex--;
                            }
                        }
                        break;
                    case 'D':
                        if (index == n) {
                            index = 1;
                            pageIndex = 1;
                        } else {
                            index++;
                            if (pageIndex != pageSize) {
                                pageIndex++;
                            }
                        }
                }
            }
            for (int i = index - pageIndex+1; i < index - pageIndex + pageSize+1; i++) {
                System.out.print(i + " ");
            }
            System.out.println();
            System.out.println(index);
        }
    }
}