CSES - Subtree Queries
• Time limit: 1.00 s
• Memory limit: 512 MB

You are given a rooted tree consisting of n nodes. The nodes are numbered 1,2,\ldots,n, and node 1 is the root. Each node has a value.

Your task is to process following types of queries:

1. change the value of node s to x
2. calculate the sum of values in the subtree of node s

# Input

The first input line contains two integers n and q: the number of nodes and queries. The nodes are numbered 1,2,\ldots,n.

The next line has n integers v_1,v_2,\ldots,v_n: the value of each node.

Then there are n-1 lines describing the edges. Each line contans two integers a and b: there is an edge between nodes a and b.

Finally, there are q lines describing the queries. Each query is either of the form "1 s x" or "2 s".

# Output

Print the answer to each query of type 2.

# Constraints

• 1 \le n, q \le 2 \cdot 10^5
• 1 \le a,b, s \le n
• 1 \le v_i, x \le 10^9

# Example

Input:

5 3
4 2 5 2 1
1 2
1 3
3 4
3 5
2 3
1 5 3
2 3


Output:

8
10