Failing to pass 2 test cases for "chef and special dishes" from march long challenge.

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I tried to solve thisproblem for march long challenge but my solution is failing to pass two test cases. Can anyone tell me what is bug in my code.

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Here: CodeChef: Practical coding for everyone

added

        if(l<=1)
            System.out.println("NO");
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@nilesh3105

Thank you.