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
subodh898:
20191115 06:24:49
segment tree + Lazy +Fast I/O only 

sourav1996:
20190920 19:47:30
Can it be solved without lazy propagation? 

rezagoodarzi:
20190808 06:03:48
badihi jat 

landofkings:
20190728 05:31:57
A good problem to learn lazy propogation. 

saurabh8522:
20190710 18:50:22
AC in one go !!!!!!!


namtruong:
20190627 18:35:36
i didn't use bit operations and still got AC :)) Last edit: 20190627 18:35:46 

vph12112016:
20190627 16:31:54
if u got TLE, let use bit instead of normal operation.... use k >> 1 instead of k * 2 Last edit: 20190627 16:34:43 

sagar_june97p:
20190530 15:40:15
Use static array instead of vector and optimize for not visiting unnecessary nodes while update and query.


amantu_amir:
20190403 23:10:06
AC after trying about a week,,


zakir068:
20190330 07:39:58
woho 1st ac with lazy approach

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 