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WXYZ's blog

I like Contest #66
By WXYZ, 13 years ago, In English
The types of the problems are my favourite, especially D and E.
  • Vote: I like it
  • +1
  • Vote: I do not like it

13 years ago, # |
  Vote: I like it +3 Vote: I do not like it
I've missed it! :(
But I was surprised that there are 3 more contests in the next few days!
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13 years ago, # |
← Rev. 2   Vote: I like it +6 Vote: I do not like it
Aha, you are earning your contributions back.

And you lost your bet, you just fail to go beyond me in just two contests. =w=
Though I think you'll soon became red. 

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  • 13 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it
    I am red now....
    Why don't you participate in round #68....
    Because of the paper?
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13 years ago, # |
  Vote: I like it 0 Vote: I do not like it
Would you like to explain how to solve D and E? I don't think there is an editorial yet and I'm quite interested in the problems.
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  • 13 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it
    Problem D: If k is 1, it is obviously that only two provinces can remain after building the roads. If k is bigger than 1, we can build tunnels between the provinces that contain two or more cities to make them like a link, and all the other cities can build tunnel should more that the provinces contains only 1 city, if not, we should build a road between two provinces with 1 city.

    Problem E: All the prime less than x should be chosen. Because a prime P can only tell from P+1 with P.

    My poor English......
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