Good!

g964 // I solved this problem. It was my mistake. I should've considered "No input" case.

In description : return the first longest string consisting ......
It need to begin at the first longest string.

std::string s = "who hit retaining The That a we taken"; // Passed
std::string sol = "who RETAINING hit THAT a THE we TAKEN";
dotest(s, sol);
s = "on I came up were so grandmothers"; //Non-Passed
sol = "i CAME on WERE up GRANDMOTHERS so";
dotest(s, sol);

In the 2nd test if you don't see anything, which string is it?

Thanks for your reply
I tried

the first line : cout<<"Input : "<<strng<<endl;
the last line : cout<<"Result :" <<result<<endl;

And all I can see in the log is

Input : who hit retating... (which is right input value)
Result : who RETATING hit... (which is also right answer)
Input : (No input value?)
"Caught unknown exception"

So I mean taka seems having trouble bringing Input value after the first fixed test.

When you "SUBMIT" there are many more fixed tests (often with edge cases).

(In the Sample test)

Fixed test : Pass

(but in the final test)

Fixed test : Non-pass
Random test : Pass

what is possibly wrong with my code? I thought the fixed tests are always same.

Just wanted to say thank you, the description for this kata is garbage and reading your description finally made it click for me.

Hi how did you see the test cases?

I understood the description but this is so hard!!
I thought once I found the longest ones (as many as int k) it would be so much simpler
but actually It's not. I have to consider same strings, same length,and given order of them at the same time.
I almost got the correct answer by using 7 while loop but I need more now. (I know it's my fault)

Writing down the equation was so far beyond helpful. Luckily, high school factoring kicked in for me and I was able to solve for 'b' which made life so easy!

Yes there are many more tests. Post a question not an issue! Issues are for errors in the kata.

It seems my solution passed the sample test.
But when I click 'attempt' , the sample test in the final test is not passed.
Is there any difference between these two sample tests?