小红书2018编程_输出字符串中最大的数

た入场券 2022-06-08 15:00 114阅读 0赞

> 题目：输入一个字符串，只有0-9的数字和大写字母，若字符串中有”RED”的子字符串则抵消该”RED”字符串，输出字符串中最大的数字，若无，则输出-1。
> 
> 输入：SGD2018RED567XHC111SDH  
> 输出：2018567
> 
> 输入：SHGDDSVBXDJGH  
> 输出：-1
> 
> 输入：HD333HS22EYF1CU88G  
> 输出：333

import java.util.Scanner;
    
    public class Main {
        private static void max(String inputStr,  StringBuffer outputStr)
        {
            String stemp = "";
            for(int i=0;i<inputStr.length();i++)
            {
                char ch = inputStr.charAt(i);
                if (ch>='0' && ch<='9')
                    outputStr.append(ch);
                else
                {
                    if (outputStr.length() > stemp.length())
                        stemp = outputStr.toString();       
                    outputStr.delete(0,outputStr.length());
                }
            }
            if (outputStr.length() > stemp.length())
                stemp = outputStr.toString();       
            outputStr.replace(0,outputStr.length(),stemp);
        }
    
        public static void main(String[] args) {
            Scanner sc = new Scanner(System.in);
            String inputBe = sc.nextLine();
            String sInput = "";  
            sInput = inputBe.replaceAll("RED","");
            StringBuffer sb = new StringBuffer();
            max(sInput,sb);
            String out = sb.toString();
            if("".equals(out))
                System.out.println("-1");
            else
                System.out.println(out);
            sc.close();
        }
    }

![这里写图片描述][SouthEast]

![这里写图片描述][SouthEast 1]

![这里写图片描述][SouthEast 2]

[SouthEast]: /images/20220608/c0d13bcef95b4dd3b60ee854e215c82e.png
[SouthEast 1]: /images/20220608/d777d109c1fb45919066c3a6e1b57c29.png
[SouthEast 2]: /images/20220608/f29debe2f3c1470c8ff17011bd64fe04.png