**Time limit:**1.00 s**Memory limit:**512 MB

Given an array of n integers, your task is to process q queries of the following types:

- update the value at position k to u
- what is the sum of values in range [a,b]?

# Input

The first input line has two integers n and q: the number of values and queries.

The second line has n integers x_1,x_2,\dots,x_n: the array values.

Finally, there are q lines describing the queries. Each line has three integers: either "1 k u" or "2 a b".

# Output

Print the result of each query of type 2.

# Constraints

- 1 \le n,q \le 2 \cdot 10^5
- 1 \le x_i, u \le 10^9
- 1 \le k \le n
- 1 \le a \le b \le n

# Example

Input:

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

Output:

14 2 11