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| #include <bits/stdc++.h>
#define int long long
const int MaxN = 100010;
struct edge
{
int next, to;
};
struct node
{
int l, r;
int sum, tag;
};
edge e[MaxN << 1];
int n, m, cnt, dfscnt;
int a[MaxN], head[MaxN], dfn[MaxN], pre[MaxN];
int top[MaxN], dep[MaxN], hson[MaxN], fa[MaxN], size[MaxN];
struct SegmentTree
{
node t[MaxN << 2];
inline void pushup(int id) { t[id].sum = t[id << 1].sum + t[id << 1 | 1].sum; }
void build(int id, int l, int r)
{
t[id].l = l, t[id].r = r;
if (l == r)
{
t[id].sum = a[pre[l]];
return;
}
int mid = (l + r) >> 1;
build(id << 1, l, mid);
build(id << 1 | 1, mid + 1, r);
pushup(id);
}
inline void pushdown(int id)
{
if (t[id].tag)
{
t[id << 1].sum += t[id].tag * (t[id << 1].r - t[id << 1].l + 1);
t[id << 1 | 1].sum += t[id].tag * (t[id << 1 | 1].r - t[id << 1 | 1].l + 1);
t[id << 1].tag += t[id].tag, t[id << 1 | 1].tag += t[id].tag;
t[id].tag = 0;
}
}
void modify(int id, int l, int r, int delta)
{
if (l > t[id].r || r < t[id].l)
return;
if (l <= t[id].l && t[id].r <= r)
{
t[id].sum += delta * (t[id].r - t[id].l + 1);
t[id].tag += delta;
return;
}
if (t[id].l == t[id].r)
return;
pushdown(id);
modify(id << 1, l, r, delta);
modify(id << 1 | 1, l, r, delta);
pushup(id);
}
int query(int id, int l, int r)
{
if (l > t[id].r || r < t[id].l)
return 0;
if (l <= t[id].l && t[id].r <= r)
return t[id].sum;
if (t[id].l == t[id].r)
return 0;
pushdown(id);
return query(id << 1, l, r) + query(id << 1 | 1, l, r);
}
} T;
inline void add_edge(int u, int v)
{
++cnt;
e[cnt].to = v;
e[cnt].next = head[u];
head[u] = cnt;
}
void dfs1(int u, int f)
{
size[u] = 1;
for (int i = head[u]; i; i = e[i].next)
{
int v = e[i].to;
if (v == f)
continue;
dep[v] = dep[u] + 1, fa[v] = u;
dfs1(v, u);
size[u] += size[v];
if (size[v] > size[hson[u]])
hson[u] = v;
}
}
void dfs2(int u, int Top)
{
++dfscnt;
dfn[u] = dfscnt;
pre[dfscnt] = u;
top[u] = Top;
if (hson[u])
dfs2(hson[u], Top);
for (int i = head[u]; i; i = e[i].next)
{
int v = e[i].to;
if (v == fa[u] || v == hson[u])
continue;
dfs2(v, v);
}
}
inline int read()
{
int x = 0, f = 1;
char ch = getchar();
while (ch > '9' || ch < '0')
{
if (ch == '-')
f = 0;
ch = getchar();
}
while (ch <= '9' && ch >= '0')
x = (x << 1) + (x << 3) + (ch ^ 48), ch = getchar();
return f ? x : (-x);
}
inline int query(int u, int v)
{
int ans = 0;
while (top[u] != top[v])
{
if (dep[u] < dep[v])
std::swap(u, v);
ans += T.query(1, dfn[top[u]], dfn[u]);
u = fa[top[u]];
}
if (dep[u] < dep[v])
std::swap(u, v);
ans += T.query(1, dfn[v], dfn[u]);
return ans;
}
signed main()
{
n = read(), m = read();
for (int i = 1; i <= n; i++)
a[i] = read();
for (int i = 1; i < n; i++)
{
int u = read(), v = read();
add_edge(u, v);
add_edge(v, u);
}
dep[1] = 1, fa[1] = 0;
dfs1(1, 0), dfs2(1, 1);
T.build(1, 1, n);
for (int i = 1; i <= m; i++)
{
int op = read();
if (op == 1)
{
int u = read(), x = read();
T.modify(1, dfn[u], dfn[u], x);
}
if (op == 2)
{
int u = read(), x = read();
T.modify(1, dfn[u], dfn[u] + size[u] - 1, x);
}
if (op == 3)
{
int u = read();
printf("%lld\n", query(u, 1));
}
}
return 0;
}
|