_aditya's blog

By _aditya, history, 4 months ago, In English,

i encountered this problem on a hiring contest and dont think its editorial will be provided. It goes like there's an array of n numbers and a number k is given. both n,k<=10^5 arr[i]<=10^5 we have to find minimum number of swaps so that all numbers greater than k are clubber together.

 
 
 
 
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4 months ago, # |
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Removed

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    4 months ago, # ^ |
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    help me with this case. array=3,4,1,1,5,6,1,1,7,8,9 k=3

    now we fix 6. no we have to bring 3,4 closer to 6 that can be done by either swapping them with first pair of 1 or second pair.

    if we do with first pair ,no of swaps resulting will be 4

    for second it will be two.

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      4 months ago, # ^ |
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      I thought we could swap only consecutive elements...

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4 months ago, # |
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Please, clarify your swapping mechanism. Can I sawp any i , j (1 <= i,j <= n) . or I can swap two consecutive elements :\ ?

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    4 months ago, # ^ |
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    sorry for that, any i,j can be swapped.

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4 months ago, # |
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I think challage is still live on hackerearth, almost after every hiring they provide solution after some time.So please wait for challange to Complete.

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4 months ago, # |
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Let's say there are p numbers greater than k in the given array. Then we have to find subarray of size p that contains maximum numbers greater than k. Answer will be numbers that are less than k in that subarray . You can do it in O(n) .

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    4 months ago, # ^ |
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    thanks a lot man.

    How long did it take you to come up with this solution.