蓝桥杯 第六届决赛 奇怪的数列 JAVA

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;class Main {    public static void main(String[] args) throws IOException {    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));    String  s = br.readLine();    int n = Integer.parseInt(br.readLine());    while(n-->0){    char c[] = s.toCharArray();    StringBuilder sb  = new StringBuilder();    char t = c[0];    int count = 0;    for (int i = 0; i < c.length; i++) {if(c[i] == t){count++;}else{t = c[i];sb.append(count+""+(c[i-1]-48));count=1;}}    sb.append(count+""+(c[c.length-1]-48));        s = sb.toString();        }    System.out.println(s);}}