DQUERY - D-query


Given a sequence of n numbers a1, a2, ..., an and a number of d-queries. A d-query is a pair (i, j) (1 ≤ i ≤ j ≤ n). For each d-query (i, j), you have to return the number of distinct elements in the subsequence ai, ai+1, ..., aj.

Input

  • Line 1: n (1 ≤ n ≤ 30000).
  • Line 2: n numbers a1, a2, ..., an (1 ≤ ai ≤ 106).
  • Line 3: q (1 ≤ q ≤ 200000), the number of d-queries.
  • In the next q lines, each line contains 2 numbers i, j representing a d-query (1 ≤ i ≤ j ≤ n).

Output

  • For each d-query (i, j), print the number of distinct elements in the subsequence ai, ai+1, ..., aj in a single line.

Example

Input
5
1 1 2 1 3
3
1 5
2 4
3 5

Output
3
2
3 

hide comments
amantu_amir: 2019-04-07 21:25:12

Nice problem!!

surajgoel1225: 2019-04-04 18:38:29

segtree and sets ..!!

viniet_sw: 2019-03-27 14:30:38

dimaag ka bhosada kar dia question ne

vartik_s: 2019-03-20 12:09:07

very strict time limit. got tle even after using cin.tie and sync with stdio. Finally got accepted using scanf and printf. Used MO's algorithm. Watch GKCS' video on the topic and you are good to go

Last edit: 2019-03-20 12:09:44
itssanat: 2019-03-09 11:16:03

better to use scanf and printf because of strict time

manojmanu: 2019-03-09 09:10:52

MO's in java get TLE ...........WTF

caro_linda2018: 2019-02-19 02:26:01

Very strict time

Last edit: 2019-02-19 02:26:18
kkkrr: 2019-01-04 01:07:31

No need of fast I/O......
Only MO's with printf,scanf works......

Last edit: 2019-01-04 01:08:10
ttnhuy313: 2019-01-01 11:02:15

cheated but AC anyway
But however, I AC with the constraint n <= 3e5 so I believe that the original constraint is correct!

Last edit: 2019-01-01 11:03:37
mulx10: 2018-12-27 11:18:53

/MO gives AC W/o fast I/O

Last edit: 2018-12-27 11:19:20

Added by:Duc
Date:2008-10-26
Time limit:0.227s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:All except: ERL JS-RHINO NODEJS PERL6 VB.NET
Resource:© VNOI