//手写了一面的第一个问题，嘻嘻。不知道对不对 import java.util.Scanner; public class Mian { public static void main(String[] args) { Scanner sc = new Scanner(System.in); String str = sc.nextLine(); int n = sc.nextInt(); System.out.println(reverse(str, n)); } public static String reverse(String str, int n) { String s = str.substring(n, str.length()) + str.substring(0, n); return s; } }