where is dp in your code ? btw, there is a spoj forum, you should search
over there and you will get the required test cases where your code fails.

Cheers!

On Sat, Mar 5, 2011 at 11:45 PM, Logic King <crazy.logic.k...@gmail.com>wrote:

> i tried to solve the problem on spoj https://www.spoj.pl/problems/TRT/
> the problem is based on DP
>
> i coded the problem as  ----
>
> #include<iostream>
> #include<algorithm>
> #include<cstdio>
> int arr[2000];
> int main()
> {
>     int i,l,r,age=1,n,sum=0;
>     scanf("%d",&n);
>     l=0,r=n-1;
>     for(i=0;i<n;i++)
>         scanf("%d",&arr[i]);
>     for(i=0;i<n;i++)
>     {
>         if(arr[l]<=arr[r])
>         {
>             sum+=arr[l]*age;
>             l++;
>             age++;
>         }
>         else
>         {
>             sum+=arr[r]*age;
>             r--;
>             age++;
>         }
>     }
>     printf("%d\n",sum);
> return 0;
> }
>
>
> but i am getting WA on submission....
> Actually my code fails on some of the test cases like
> INPUT-
> 6
> 21
> 31
> 12
> 3
> 4
> 33
>
>
>
> The algorithm i use would give 349 (21*1 + 31*2 + 12*3 + 3*4 + 4*5 + 33*6)
> as the answer.
>
> But the correct answer is 389 with sequence of picking as(33, 4, 3, 12, 21,
> 31).
>
> plz help me improve my algorithm !!
>
> thanking in advance
>
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