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CSES Problem Set

# Subtree Queries

Task | Statistics

CSES - Subtree QueriesCSES - Subtree Queries

 Time limit: 1.00 s Memory limit: 512 MB

You are given a rooted tree that consists 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 $n$: 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 that describe the edges. Each line contans two integers $a$ and $b$: there is an edge between nodes $a$ and $b$.

Finally, there are $q$ lines that describe 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