BanazadehAria's blog

Problem in 553A
By BanazadehAria, history, 6 years ago, In English

Hi, I have written this code and i am using dp for problem 553 A.What is wrong with my idea and code?

Question Link==>https://mirror.codeforces.com/contest/553/problem/A

My Submission==>55667272

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6 years ago, # |
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Auto comment: topic has been updated by BanazadehAria (previous revision, new revision, compare).

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6 years ago, # |
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Try printing the dp table and inspecting the values. You should be able to deduce why your logic is wrong from there.

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    6 years ago, # ^ |
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    Thank you ,I think its a code problem.

    What is wrong with it? ==> 1-If this new ball is from a new color then we must put it at last of the line Because it's the only and of course last element of new color. dp[i-1][j-1] 2-If it's not then we can put it anywhere else dp[i-1][j]*i

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      6 years ago, # ^ |
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      You are going to have to refer to a combinatorics text to check your concepts. I don't have time to debug your logic.

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        6 years ago, # ^ |
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        Ok you know you wrote 2 lines to say that you don't have time you could read two lines in that time.

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