// ---------- begin Centroid Decomposition ----------
struct CentroidDecomposition {
    graph: Vec<Vec<usize>>,
    next: Vec<(usize, usize)>,
}

#[allow(dead_code)]
impl CentroidDecomposition {
    fn new(n: usize) -> Self {
        CentroidDecomposition {
            graph: vec![vec![]; n],
            next: vec![],
        }
    }
    fn add_edge(&mut self, a: usize, b: usize) {
        self.graph[a].push(b);
        self.graph[b].push(a);
    }
    fn build(&mut self) {
        let graph = &self.graph;
        let next = &mut self.next;
        let n = graph.len();
        next.clear();
        next.resize(n, (n, n));
        assert!(
            graph.iter().fold(0, |s, a| s + a.len()) == 2 * n - 2,
            "graph is not tree"
        );
        let mut dfs = vec![(0, 0, n)];
        let mut used = vec![false; n];
        let mut size = vec![0; n];
        let mut stack = vec![];
        let mut q = vec![];
        while let Some((v, rank, g)) = dfs.pop() {
            size[v] = 0;
            stack.push((v, v));
            q.clear();
            while let Some((v, p)) = stack.pop() {
                q.push(v);
                for &u in graph[v].iter() {
                    size[u] = 0;
                    if u != p && !used[u] {
                        stack.push((u, v));
                    }
                }
            }
            for &v in q.iter().rev() {
                size[v] = 1;
                for &u in graph[v].iter() {
                    size[v] += size[u];
                }
            }
            let mut parent = v;
            let mut r = v;
            loop {
                let mut max = (0, 0);
                for &u in graph[r].iter() {
                    if u != parent && !used[u] {
                        max = std::cmp::max(max, (size[u], u));
                    }
                }
                if 2 * max.0 <= size[v] {
                    break;
                }
                parent = r;
                r = max.1;
            }
            used[r] = true;
            next[r] = (rank, g);
            for &v in graph[r].iter() {
                if !used[v] {
                    dfs.push((v, rank + 1, r));
                }
            }
        }
    }
    fn belong(&self, v: usize) -> Vec<usize> {
        let mut ans = vec![];
        let mut v = v;
        while v < self.graph.len() {
            ans.push(v);
            v = self.next[v].1;
        }
        ans
    }
    fn rank(&self, v: usize) -> usize {
        self.next[v].0
    }
}
// ---------- end Centroid Decomposition ----------
// ---------- begin scannner ----------
#[allow(dead_code)]
mod scanner {
    use std;
    use std::io::Read;
    use std::str::FromStr;
    use std::str::SplitWhitespace;
    pub struct Scanner<'a> {
        it: SplitWhitespace<'a>,
    }
    impl<'a> Scanner<'a> {
        pub fn new(s: &'a String) -> Scanner<'a> {
            Scanner {
                it: s.split_whitespace(),
            }
        }
        pub fn next<T: FromStr>(&mut self) -> T {
            match self.it.next().unwrap().parse::<T>() {
                Ok(v) => v,
                _ => panic!("Scanner error"),
            }
        }
        pub fn next_chars(&mut self) -> Vec<char> {
            self.next::<String>().chars().collect()
        }
        pub fn next_vec<T: FromStr>(&mut self, len: usize) -> Vec<T> {
            (0..len).map(|_| self.next()).collect()
        }
    }
    pub fn read_string() -> String {
        let mut s = String::new();
        std::io::stdin().read_to_string(&mut s).unwrap();
        s
    }
}
// ---------- end scannner ----------

use std::io::Write;

fn main() {
    let sc = scanner::read_string();
    let mut sc = scanner::Scanner::new(&sc);
    let out = std::io::stdout();
    let mut out = std::io::BufWriter::new(out.lock());
    run(&mut sc, &mut out);
}

fn run(sc: &mut scanner::Scanner, out: &mut std::io::BufWriter<std::io::StdoutLock>) {
    let n: usize = sc.next();
    let m: usize = sc.next();
    let q: usize = sc.next();
    let mut c: Vec<_> = (0..m).map(|_| sc.next::<usize>() - 1).collect();
    let mut cent = CentroidDecomposition::new(n);
    for _ in 1..n {
        let a = sc.next::<usize>() - 1;
        let b = sc.next::<usize>() - 1;
        cent.add_edge(a, b);
    }
    cent.build();
    let cent = cent;
    let mut memo = vec![];
    for r in 0.. {
        let mut dp = vec![n as i64; n];
        let mut q = std::collections::VecDeque::new();
        for i in 0..n {
            if cent.rank(i) == r {
                dp[i] = 0;
                q.push_back(i);
            }
        }
        if q.is_empty() {
            break;
        }
        while let Some(v) = q.pop_front() {
            let d = dp[v] + 1;
            for &u in cent.graph[v].iter() {
                if cent.rank(u) >= r && dp[u] > d {
                    dp[u] = d;
                    q.push_back(u);
                }
            }
        }
        memo.push(dp);
    }
    // 距離の和、個数
    let mut all = vec![(0, 0); n];
    let mut sub = vec![(0, 0); n];
    for &c in c.iter() {
        let belong = cent.belong(c);
        for (dp, &g) in memo.iter().zip(belong.iter().rev()) {
            all[g].0 += dp[c];
            all[g].1 += 1;
        }
        for (dp, &g) in memo.iter().zip(belong.iter().rev().skip(1)) {
            sub[g].0 += dp[c];
            sub[g].1 += 1;
        }
    }
    for _ in 0..q {
        let op: u8 = sc.next();
        if op == 1 {
            let p = sc.next::<usize>() - 1;
            let d = sc.next::<usize>() - 1;
            for &(sign, v) in [(-1, c[p]), (1, d)].iter() {
                let belong = cent.belong(v);
                for (dp, &g) in memo.iter().zip(belong.iter().rev()) {
                    all[g].0 += sign * dp[v];
                    all[g].1 += sign;
                }
                for (dp, &g) in memo.iter().zip(belong.iter().rev().skip(1)) {
                    sub[g].0 += sign * dp[v];
                    sub[g].1 += sign;
                }
            }
            c[p] = d;
        } else {
            let e = sc.next::<usize>() - 1;
            let belong = cent.belong(e);
            let mut ans = 0;
            for (dp, &g) in memo.iter().zip(belong.iter().rev()) {
                ans += all[g].0;
                ans += all[g].1 * dp[e];
            }
            for (dp, &g) in memo.iter().zip(belong.iter().rev().skip(1)) {
                ans -= sub[g].0;
                ans -= sub[g].1 * dp[e];
            }
            writeln!(out, "{}", ans).ok();
        }
    }
}