Readme.md

Candy

Description

Recently, Andrea received $n$ piles of candy. The $i$-th pile contains $a_i$ candies. She would perform $m$ operations on these piles as follows:

1. Change the number of candies in pile $x$ to $v$
2. Find the sum of the number of candies in the given interval

Input Format

The first line contains two integers $n$, representing the number of piles, and $m$, representing the number of operations.

The second line contains $n$ integers, the $i$-th integer represents the $a_i$.

The following $m$ lines each contain three integers representing the operations. The format are:

1. 0 x v: change the number of $a[x]$ to $v$
2. 1 l r: print the sum of the number of candies in the interval $[l,r]$.

Output Format

Print several lines. Each line contains one integer representing the result of operation 2.

Sample

Input

5 4
3 6 1 8 5
1 2 5
0 3 4
1 1 4
1 2 5

Output

20
21
23

Range

For 30% testcases:

$1\le n\le 5000$

For all testcases:

$1\le n\le {10}^5,0\le a_i,v\le 1000,1\le l\le r\le n$