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#include <bits/stdc++.h>
const int MAXN = 30010;
struct Node *null;
struct Node {
Node *c[2], *fa;
bool rev;
Node *top;
int sum, max, val;
Node() : sum(0), val(0), max(INT_MIN), fa(null) {
c[0] = c[1] = null;
}
inline void maintain() {
sum = c[0]->sum + c[1]->sum + val;
max = std::max(val, std::max(c[0]->max, c[1]->max));
}
inline void reverse() {
rev ^= 1, std::swap(c[0], c[1]);
}
inline void pushDown() {
rev ? c[0]->reverse(), c[1]->reverse(), rev = false : 0;
}
inline bool relation() {
return this == fa->c[1];
}
inline void rotate(bool f) {
Node *o = fa;
top = o->top;
o->pushDown(), pushDown();
(fa = o->fa)->c[o->relation()] = this;
(o->c[f] = c[!f])->fa = o;
(c[!f] = o)->fa = this;
o->maintain();
}
inline void splay() {
Node *o = fa;
bool f;
for (pushDown(); o != null; o = fa) {
o->fa == null ? rotate(o->c[1] == this) :
((f = o->c[1] == this) == (o->fa->c[1] == o)
? (o->rotate(f), rotate(f)) : (rotate(f), rotate(!f)));
}
maintain();
}
inline void expose(Node *p = null) {
splay();
if (c[1] != null)
c[1]->top = this, c[1]->fa = null;
(c[1] = p)->fa = this;
maintain();
}
inline Node *access() {
Node *x = this;
for (x->expose(); x->top; x = x->top)
x->top->expose(x);
return x;
}
inline void evert() {
access(), splay(), reverse();
}
inline void link(Node *f) {
Node *x = access();
x->reverse(), x->top = f;
}
inline void cut(Node *y) {
Node *x = this;
x->expose(), y->expose();
if (x->top == y) x->top = NULL;
if (y->top == x) y->top = NULL;
}
inline Node *findRoot() {
Node *f = this;
f->access(), f->splay();
while (f->pushDown(), f->c[0] != null) f = f->c[0];
return f;
}
inline void split(Node *v) {
v->evert(), access(), splay();
}
inline void init(int val) {
this->val = max = sum = val;
}
} pool[MAXN];
inline void init() {
null = pool, null->fa = null;
null->sum = 0;
null->val = null->max = INT_MIN;
}
inline const int querySum(int u, int v) {
(pool + u)->split(pool + v);
return (pool + u)->sum;
}
inline const int queryMax(int u, int v) {
(pool + u)->split(pool + v);
return (pool + u)->max;
}
inline void update(int u, const int value) {
(pool + u)->splay();
(pool + u)->val = value;
(pool + u)->maintain();
}
inline char nextChar() {
static const int IN_LEN = 1000000;
static char buf[IN_LEN], *s, *t;
if (s == t) {
t = (s = buf) + fread(buf, 1, IN_LEN, stdin);
if (s == t) return -1;
}
return *s++;
}
inline int read() {
static int x = 0;
static char c;
static bool iosig;
for (iosig = false, x = 0, c = nextChar(); !isdigit(c); c = nextChar()) {
if (c == '-') iosig = true;
}
for (; isdigit(c); c = nextChar())
x = (x + (4 * x) << 1) + (c ^ '0');
return iosig ? -x : x;
}
const int OUT_LEN = 10000000;
char obuf[OUT_LEN], *oh = obuf;
template<class T>
inline void print(T x) {
static int buf[30], cnt;
if (x == 0) {
*oh++ = '0';
} else {
if (x < 0) *oh++ = '-', x = -x;
register int cnt = 0;
for (cnt = 0; x; x /= 10) buf[++cnt] = x % 10 + 48;
while (cnt) *oh++ = buf[cnt--];
}
}
template<class T>
inline void println(T x) {
print(x), *oh++ = '\n';
}
inline void flush() {
fwrite(obuf, 1, oh - obuf, stdout);
}
int n, q;
struct Edge {
int u, v;
inline void read() {
u = ::read(), v = ::read();
}
} edge[MAXN];
int main() {
#ifndef ONLINE_JUDGE
freopen("in.in", "r", stdin);
#endif
n = read();
init();
for (register int i = 1; i <= n; i++) pool[i] = Node();
for (register int i = 0, u, v; i < n - 1; i++) edge[i].read();
for (register int i = 1; i <= n; i++) {
(pool + i)->init(read());
}
for (register int i = 0; i < n - 1; i++) {
(pool + edge[i].u)->link(pool + edge[i].v);
}
q = read();
for (register int i = 0; i < q; i++) {
nextChar();
register char str = nextChar();
if (str == 'H') {
register int u = read(), t = read();
update(u, t);
} else if (str == 'M') {
register int u = read(), v = read();
println(queryMax(u, v));
} else if (str == 'S') {
register int u = read(), v = read();
println(querySum(u, v));
}
}
flush();
return 0;
}
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