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  1. Practice
  2. Java
  3. Introduction
  4. Java Loops II
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Java Loops II

  • chamzz + 1 comment

    Yes.This is correct. But I have one question... In the series we can see evey value is multiply by b.(either first a also).But in your code I can't see that. But your one gives correct answer. Can you please explain that for me?

    I used this and this gives wrong answerI can't realize why it is wrong???

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

class Solution{
    public static void main(String []argh){
        Scanner in = new Scanner(System.in);
        
        int t=in.nextInt();
        
        for(int q1=0;q1<t;q1++){
            
            int a = in.nextInt();
            int b = in.nextInt();
            int n = in.nextInt();
            int ans=a+1*b;   
                for(int j=0;j<n;j++){
                    int x=2^j*b;
                    ans+=x;
                   System.out.print(ans+" ");
                    
                   
                    
                 }
             
            System.out.println();
        }

        
        in.close();
    }
}
    • rcardoso + 1 comment

      This line:

      int ans=a+1*b;

      Should be:

      int ans = a;

      Since you're loop from 0 you code is calculating a + 2^0*b twice and you will get a wrong result.

      And this line:

      int x=2^j*b;

      The '^' it xor (exclusive or) operator not pow operator. You have to use Math.pow(); or a shift operation.

      • aksha_v95 + 0 comments

        Thank You. I have used the shift operation as you said but two test cases failed out of 5. Could you please help me with this code?

        class Solution{
    public static void main(String []argh){
        Scanner in = new Scanner(System.in);
        int t=in.nextInt();
        for(int i=0;i<t;i++){
            int a = in.nextInt();
            int b = in.nextInt();
            int n = in.nextInt();
            int first = a+b;
            int sec = (2*b)+first;
            System.out.print(first+" "+sec+" ");
            int sum = sec;
            for(int j=1;j<=n-2;j++){
                
                int s = ((2<<j)*b);      
                sum = sum + s;
                System.out.print(sum+" ");
            } 
            System.out.println(" ");
        }
        in.close();
    }
}