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
hide comments
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tawhidkuet04:
2017-04-25 08:35:01
Can be easily done by segment tree with vectors. |
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Ashwani Gautam:
2017-03-26 07:36:22
Test data is now correct! got AC without handling Blue.Mary assumptions.
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kunalk:
2017-03-15 20:43:31
can someone please explain how to solve it with sqr_root decomposition ?? |
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Abhishek Kainth:
2016-12-30 18:32:54
Thanks @[Rampage] Blue.Mary
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mahmood_2000:
2016-11-05 10:09:34
Great problem for learning sqr_root decompostion but watch out you have to use fast i/o (i.e in c++ I had to use scanf and printf to get AC)
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sekhar162:
2016-09-03 22:42:15
do it in 1 based indexing... |
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secta:
2016-07-29 14:01:16
Why am I not shown on the ranking, I have an accepted solution running in 0.08? |
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[Rampage] Blue.Mary:
2016-01-21 04:30:15
OK. The test data seems not satisfy the conditions mentioned in problem description. I assume the following:
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spoj2121:
2015-12-27 18:45:27
merge sort tree..with fast I/O = 3rd fastest solution ^_^ |
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khoonicoder:
2015-09-02 04:38:34
Merge Sort Tree gives AC in first time while Persistent Segment Tree giving the Segmentation Fault
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Added by: | amirmd76 |
Date: | 2015-04-17 |
Time limit: | 0.200s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All |