How to derive test cases for problems like this
Can anyone derive possible test cases for this problem, I am getting wrong answer for its solution, my code is working fine with all the test cases, which I have developed.
This tool might come in handy.
You can generate random arrays,strings and even graphs there .
For questions like this you can generate the graphs randomly but I think since the queries are complex(two kinds of queries ) , you would need to generate those yourselves .
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