FREQUENT  Frequent values
You are given a sequence of n integers a_{1} , a_{2} , ... , a_{n} in nondecreasing order. In addition to that, you are given several queries consisting of indices i and j (1 ≤ i ≤ j ≤ n). For each query, determine the most frequent value among the integers a_{i} , ... , a_{j}.
Input Specification
The input consists of several test cases. Each test case starts with a line containing two integers n and q (1 ≤ n, q ≤ 100000). The next line contains n integers a_{1} , ... , a_{n} (100000 ≤ a_{i} ≤ 100000, for each i ∈ {1, ..., n}) separated by spaces. You can assume that for each i ∈ {1, ..., n1}: a_{i} ≤ a_{i+1}. The following q lines contain one query each, consisting of two integers i and j (1 ≤ i ≤ j ≤ n), which indicate the boundary indices for the query.
The last test case is followed by a line containing a single 0.
Output Specification
For each query, print one line with one integer: The number of occurrences of the most frequent value within the given range.
Sample Input
10 3 1 1 1 1 1 1 3 10 10 10 2 3 1 10 5 10 0
Sample Output
1 4 3
A naive algorithm may not run in time!
hide comments
krishna Murari:
20190207 13:04:08
handling the 0 case cost half my day 

nour_massri:
20190127 20:51:09
same as Uva 11235 :) 

joe85123:
20181128 16:47:03
solving GSS1 first really helped a lot! 

DOT:
20180801 20:12:41
Phew! At last, AC. Didn't understand multiple test cases will come until 0 is entered.


horizon121:
20180610 08:11:29
AC in one Go .


thekidnamedme:
20180607 13:13:09
Interesting find. My AC solution differs from that on spoj toolkit for testcase #23 (1 conflict).


nuhash_40:
20180518 18:06:37
Thought my submission would give tle as i used map in query


hackerwizard:
20180413 21:48:46
AC in one go!!! 

gyanendra371:
20180323 14:12:24
someone pls explain the code on codechef link


coolio_1:
20180304 07:53:43
There are multiple test cases! Cost me one WA! :( Btw segment tree rocks! :D 
Added by:  Adrian Kuegel 
Date:  20070706 
Time limit:  1s 
Source limit:  50000B 
Memory limit:  1536MB 
Cluster:  Cube (Intel G860) 
Languages:  All except: ERL JSRHINO NODEJS PERL6 VB.NET 
Resource:  University of Ulm Local Contest 2007 