New_and_simple's blog

Help with a Div 4 problem
By New_and_simple, history, 9 hours ago, In English

Participated in the recent div4 contest. Got stuck in this problem CF 1003 div 4 C2 during the contest. The editorial used a left to right approach, I have used a meet at middle approach. What have I missed? I also learnt the modified binary search after the contest.

My code

It's not that I want to shove off my load to someone else, I can't access the problematic test case. Would appreciate help.

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9 hours ago, # |
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Do you enter the contest?

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    8 hours ago, # ^ |
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    I did but performed bad. Only solved A which was free. Could have solved B too but I was greedy and jumped to C. Spent two hours, best I could come up with was a O(n2) solution, but it didn't work. My current one is O(nlogn) but it's getting WA on test 3.

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4 hours ago, # |
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1
4 1
3 6 1 2
5

Check for this testcase

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    72 minutes ago, # ^ |
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    Thanks a lot for your help, I genuinely appreciate it. And sorry for the trouble. Hope you have good times ahead.

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