SP7299 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".

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 1 line for each of the queries of the form "1 A B" containing the required answer for the corresponding query.