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KQUERYO - K-Query Online |
Given a sequence of n numbers a1, a2, ..., an and a number of k-queries. A k-query is a triple (i, j, k) (1 ≤ i ≤ j ≤ n). For each k-query (i, j, k), you have to return the number of elements greater than k in the subsequence ai, ai+1, ..., aj.
Input
- Line 1: n (1 ≤ n ≤ 30000).
- Line 2: n numbers a1, a2, ..., an (1 ≤ ai ≤ 109).
- Line 3: q (1 ≤ q ≤ 200000), the number of k- queries.
- In the next q lines, each line contains 3 numbers a, b, c representing a k-query. You should do the following:
- i = a xor last_ans
- j = b xor last_ans
- k = c xor last_ans
Where last_ans = the answer to the last query (for the first query it's 0).
Output
For each k-query (i, j, k), print the number of elements greater than k in the subsequence ai, ai+1, ..., aj in a single line.
Example
Input: 6 8 9 3 5 1 9 5 2 3 5 3 3 7 0 0 11 0 0 2 3 7 4 Output: 1 1 0 0 2
[Edited by EB]
There are invalid queries. Assume the following:- if i < 1: i = 1
- if j > n: j = n
- if i > j: ans = 0
Added by: | amirmd76 |
Date: | 2015-04-17 |
Time limit: | 0.200s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All |
hide comments
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2023-10-05 02:08:30
sqrt decomposition |
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2021-03-23 17:18:49
be sure that you have 1-indexed tree :) |
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2020-10-10 13:30:43
Nice question for beginners in persistent segment tree |
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2020-07-05 05:30:37
plz,someone explain me the 2nd query..thanks in advance ; ) |
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2020-05-28 13:00:37
Merge sort tree :) |
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2020-05-24 15:29:10
There are AC's in Java. https://www.spoj.com/ranks/KQUERYO/lang=JAVA |
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2020-05-24 08:36:56
Hi, JAVA users this question is not tested in Java. I tried 1. Persistence Seg Tree - https://pastebin.ubuntu.com/--------- 2. Sqrt Decomposition - https://pastebin.ubuntu.com/------------ 3. Merge Sort Tree - https://pastebin.ubuntu.com/---------------- All the solutions are giving TLE. Last edit: 2020-05-25 08:44:22 |
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2020-04-19 16:55:17
is there any working online solution!! |
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2020-03-31 10:30:39
make sure to handle x>y and x>n in case using merge sort tree |
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2020-01-01 05:48:44
I am getting WA, but works all my own examples.. |