### Drom's blog

By Drom, history, 7 months ago, ,

We can solve the question using the recurrence $dp[i][j]=dp[i−1][j−1]+dp[i−2][j−1]+.....+dp[1][j−1]$ where i is the index and j is the length of the sequence and using K BITs to speed up the calculation of the sum.

Is there any way to solve it using segment tree as a different approach?

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By Drom, history, 8 months ago, ,

Hi codeforces,

I'm trying to solve problem 372A ( Counting Kangaroos is Fun ), but i can't figure out what's wrong with my solution #50057680. What i am trying to do is sort the array and use two pointers to get the answer but i'm stuck on test case 6?