编程写不了，只能直接手算出来了。。。。。

数据说明：若超过起征点最多达到1500，最多需要交45的税
若超过起征点最多达到4500，最多需要交345的税

import java.util.Scanner;

public class Main
{

    public static void main(String[] args)
    {
        Scanner scan=new Scanner(System.in);

        int s=scan.nextInt();

        if(s<=3500)
        {
            System.out.println(s);
        }
        else if(s<=4955)//1500 3%
        {
            s-=3500;
            //1455
            //x-(x*0.03)=1455
            //9.97x=1455;
            //x=1455/0.97;
            double ans=s/0.97;
            System.out.println((int)ans+3500);

        }
        else if(s<=7655)//4500 10%
        {
            s-=3500;
            //x-(x1+(x-1500)*0.1)=s
            s-=150;
            s+=45;
            double ans=s/0.9;
            System.out.println((int)ans+3500);

        }
        else if(s<=11255)//9000 20%
        {
            s-=3500;
            //x-(x1+x2+(x-4500)*0.2=s;
            s+=45;
            s+=300;
            s-=900;
            double ans=s/0.8;
            System.out.println((int)ans+3500);
        }
        else if(s<=30755)//35000
        {
            s-=3500;
            //x-(x1+x2+x3+(x-9000)*0.25=s;
            s+=1245;
            s-=2250;
            double ans=s/0.75;
            System.out.println((int)ans+3500);
        }
        else if(s<=44755)//55000
        {
            s-=3500;
            //x-(x1+x2+x3+x4+(x-35000)*0.3=s;
            s+=7745;
            s-=10500;
            double ans=s/0.7;
            System.out.println((int)ans+3500);
        }
        else if(s<=61005)//80000
        {
            s-=3500;
            s+=13745;
            s-=19250;
            double ans=s/0.65;
            System.out.println((int)ans+3500);

        }
        else
        {
            s-=3500;
            s+=22495;
            s-=36000;
            double ans=s/0.55;
            ans=Math.ceil(ans);
            System.out.println((int)ans+3500);
        }


        scan.close();

    }

}