201612-2 工资计算 Java

思路：
税+税后所得A=税前工资S。
因为工资是整百的数，每次减100来判断。好理解但是超时。

import java.util.Scanner;
//只有90分，超时了
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int T = sc.nextInt();
        if(T < 3500) {
            System.out.println(T);
        }
        double x = 0;//税钱
        int S = 200000;//假设一个月最多挣20万
        int A = S - 3500;
        while(true)
        {
            if(A <= 1500)
                x = A * 0.03;
            else if(A <= 4500)
                x = 45 + (A - 1500) * 0.1;
            else if(A <= 9000)
                x = 45 + 300 + (A - 4500) * 0.2;
            else if(A <= 35000)
                x = 45 + 300 + 900 + (A - 9000) * 0.25;
            else if(A <= 55000)
                x = 45 + 300 + 900 + 6500 + (A - 35000) * 0.3;
            else if(A <= 80000)
                x = 45 + 300 + 900 + 6500 + 6000 + (A - 55000) * 0.35;
            else
                x = 45 + 300 + 900 + 6500 + 6000 + 8750 + (A - 80000) * 0.45;
            if(S == x + T)
                break;
            S = S - 100;
            A = S - 3500;
        }
        System.out.println(S);
    }

}