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I agree with your all comments but one thing i can not understand.
If you see the number of uniq hacker_id for first day is 112 and the second day is 59.
How it is possible if consider the hacker have atleast one submission each day. As per your explation there should be increase in submissions.
Please correct me if i am wrong or you can not understand the explanation.
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I agree with your all comments but one thing i can not understand. If you see the number of uniq hacker_id for first day is 112 and the second day is 59. How it is possible if consider the hacker have atleast one submission each day. As per your explation there should be increase in submissions. Please correct me if i am wrong or you can not understand the explanation.