You are given an array $A$ of $n$ integers.
There are $q$ queries of either form:
- `1 i x`: Assign $x$ to $A_i$.
- `2 l r`: Find the sum $A_l+A_{l+1}+...+A_r$.
### Input
- The first line contains 2 integers $n, q$.
- The second line contains $n$ integers $A_i$.
- The next $q$ lines, each line contains 3 integers, a query.
### Output
- Print the answer for each query of type $2$.
### Constraints
- $1 \le n \le 10^5$.
- $1 \le i \le n$.
- $1 \le l \le r \le n$.
- $1 \le A_i, x \le 10^9$.
### Example
Input:
```
5 3
1 2 3 3 2
2 2 4
1 4 5
2 3 5
```
Output:
```
8
10
```
