Jawaban Rias si Fisikawati 1

import java.io.*;
import java.util.*;

public class Solution {



    public static void main(String[] args) {
    String s1,s2,s3,s4; int x = 0;
    Scanner masuk = new Scanner(System.in);
    s1 = masuk.nextLine();
    s2 = masuk.nextLine();
        s3 = masuk.nextLine();
        s4 = masuk.nextLine();
        if(s1.equals("cari"))
        {
            x++; s1 = "0";
        }
        if(s2.equals("cari"))
        {
            x++; s2 = "0";
        }
        if(s3.equals("cari"))
        {
            x++; s3 = "0";
        }
        if(s4.equals("cari"))
        {
            x++; s4 = "0";
        }
        double v1 = Double.valueOf(s1);
        double r1 = Double.valueOf(s2);
        double v2 = Double.valueOf(s3);
        double r2 = Double.valueOf(s4);
        if(x>=2)
        {
            System.out.print("INFINITY");
        }
        else if(x==1)
        {
            if(v1==0)
            {
                v1 = v2*r1/r2;
                System.out.printf("v1 = %.2f",v1);
            }
            else if(r1==0)
            {
                r1 = v1*r2/v2;
                System.out.printf("r1 = %.2f",r1);
            }
            else if(v2==0)
            {
                v2 = v1*r2/r1;
                System.out.printf("v2 = %.2f",v2);
            }
            else if(r2==0)
            {
                r2 = v2*r1/v1;
                System.out.printf("r2 = %.2f",r2);
            }
        }
        else if(x==0)
        {
            System.out.print("APA YANG DICARI?");
        }
    }
}