A Lazy Problem

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Points: 5
Time limit: 1.0s
Memory limit: 64M

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Problem type

Given an array a of length N filled with 0s at the beginning, and Q queries, support the following queries:

  • 1 l r Output the sum of the elements in the subarray [l,r]\ (1 \le l \le r \le N).
  • 2 v Add v to all elements in the array, (1 \le v \le 10^5).

Input Specification

The first line will contain two integers N, Q\ (1 \le N, Q \le 10^5).

The next Q lines will each contain a query of the form defined above.

Output Specification

For each type 1 query, output the desired answer.

Sample Input

4 3
1 2 3
2 4
1 2 4

Sample Output

0
12

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