题解 | #表示数字#

import java.io.*;

public class Main{ public static void main(String[] args)throws IOException{ BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); String str = ""; while ((str = br.readLine()) != null){ char[] c = str.toCharArray(); StringBuilder sb = new StringBuilder(); int i = 0; while(i < c.length){ if (c[i] >= '0' && c[i] <= '9'){ sb.append(""); sb.append(c[i]); while(++i < c.length && c[i] >= '0' && c[i] <= '9'){ sb.append(c[i]); } sb.append(""); }else{ sb.append(c[i]); i++; } } System.out.println(sb.toString()); } } }