the example given in the link , tried 2-3 other example ..it seems to work
for them.Maybe problem is not that simple and may fail for some tricky test
case.So please correct me if i am wrong:-

input : 2 3 4 1 1
sort(input) :  1 1 2 3 4
k=3

from end keep on adding till k-1
add position 4 become : 4+3+2 (cost 5 : 3 + 2)
add position 2 : 1+1 (cost 1 :1)
add position 2 to 4 : 4+3+2+1+1(cost 2 )

total cost : 5+1+2 = 8

On Tue, Sep 25, 2012 at 1:23 AM, Krishnan <aariyankrish...@gmail.com> wrote:

> http://codeforces.com/contest/227/problem/D
>
> How to approach this problem can anybody help?
>
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