MULTQ3  Multiples of 3
There are N numbers a[0],a[1]..a[N  1].
Initally all are 0. You have to perform two types of operations :
1) Increase the numbers between indices A and B (inclusive) by 1.
This is represented by the command "0 A B"
2) Answer how many numbers between indices A and B (inclusive) are divisible by 3.
This is represented by the command "1 A B".
Input
The first line contains two integers, N and Q. Each of the next Q lines are either of the form "0 A B" or "1 A B" as mentioned above.
Output
Output 1 line for each of the queries of the form "1 A B" containing the required answer for the corresponding query.
Sample
Sample Input : 4 7 1 0 3 0 1 2 0 1 3 1 0 0 0 0 3 1 3 3 1 0 3 Sample Output : 4 1 0 2
Constraints
1 <= N <= 100000
1 <= Q <= 100000
0 <= A <= B <= N  1
hide comments
oldmonk:
20110612 12:25:01
getting TLE suggest some method to make it faster 

paddyHOD:
20110210 11:00:15
my answer is correct


Anil Kishore:
20100928 07:05:58
yes it is, thats why the first query "1 0 3" ( how many of A[0..3] are divisble by 3 ) returns 4 ( all 0s initially ) 

Seshadri R:
20100928 07:05:58
Is zero considered to be divisible by 3? Otherwise, how can the first Sample output be explained? 
Added by:  Varun Jalan 
Date:  20100912 
Time limit:  1s 
Source limit:  50000B 
Memory limit:  1536MB 
Cluster:  Cube (Intel G860) 
Languages:  All except: NODEJS OBJC VB.NET 
Resource:  own problem 