给出一棵树，有三种操作：
1 x：把以x为子树的节点全部置为1
2 x：把x以及他的所有祖先全部置为0
3 x：询问节点x的值
分析：
昨晚看完题，马上想到直接树链剖分，在记录时间戳时需要记录一下出去时的时间戳，然后就是很裸很裸的树链剖分了。
稳稳的黄名节奏，因为一点私事所以没做导致延迟了
(ps：后来想了一下，不用树链剖分直接dfs序维护也行。。。)
#include <set>
#include <map>
#include <list>
#include <cmath>
#include <queue>
#include <stack>
#include <string>
#include <vector>
#include <cstdio>
#include <cstring>
#include <iostream>
#include <algorithm>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
#define debug puts("here")
#define rep(i,n) for(int i=0;i<n;i++)
#define rep1(i,n) for(int i=1;i<=n;i++)
#define REP(i,a,b) for(int i=a;i<=b;i++)
#define foreach(i,vec) for(unsigned i=0;i<vec.size();i++)
#define pb push_back
#define RD(n) scanf("%d",&n)
#define RD2(x,y) scanf("%d%d",&x,&y)
#define RD3(x,y,z) scanf("%d%d%d",&x,&y,&z)
#define RD4(x,y,z,w) scanf("%d%d%d%d",&x,&y,&z,&w)
#define All(vec) vec.begin(),vec.end()
#define MP make_pair
#define PII pair<int,int>
#define PQ priority_queue
#define cmax(x,y) x = max(x,y)
#define cmin(x,y) x = min(x,y)
#define Clear(x) memset(x,0,sizeof(x))
/*
#pragma comment(linker, "/STACK:1024000000,1024000000")
int size = 256 << 20; // 256MB
char *p = (char*)malloc(size) + size;
__asm__("movl %0, %%esp
" :: "r"(p) );
*/
/******** program ********************/
char op,s[12];
int tp;
inline void Int(int &x){
while( !isdigit(op=getchar()) );
x = op-'0';
while( isdigit(op=getchar()) )
x = x*10+op-'0';
}
inline void LL(ll &x){
while( !isdigit(op=getchar()) );
x = op-'0';
while( isdigit(op=getchar()) )
x = x*10+op-'0';
}
inline void Out(ll x){
s[0] = '0';
tp = 0;
while(x){
s[tp++] = x%10+'0';
x /= 10;
}
for(int i=tp-1;i>=0;i--)
putchar(s[i]);
puts("");
}
const int MAXN = 500005;
int son[MAXN],sz[MAXN],dep[MAXN],fa[MAXN],top[MAXN],tim;
bool use[MAXN];
int st[MAXN],ed[MAXN];
int po[MAXN],tol;
int n,m;
struct Edge{
int y,next;
}edge[MAXN<<1];
inline void add(int x,int y){
edge[++tol].y = y;
edge[tol].next = po[x];
po[x] = tol;
}
// 树链剖分
void dfsFind(int x,int pa,int depth){
son[x] = 0;
sz[x] = 1;
dep[x] = depth;
fa[x] = pa;
for(int i=po[x];i;i=edge[i].next){
int y = edge[i].y;
if(y==pa)continue;
dfsFind(y,x,depth+1);
sz[x] += sz[y];
if(sz[y]>sz[son[x]])
son[x] = y;
}
}
void dfsCon(int x,int pa){
use[x] = true;
top[x] = pa;
st[x] = ++ tim; // 记录进入时的时间戳
if(son[x])dfsCon(son[x],pa);
for(int i=po[x];i;i=edge[i].next){
int y = edge[i].y;
if(!use[y])dfsCon(y,y);
}
ed[x] = tim;
}
// 线段树部分
struct segTree{
int l,r;
int col,lz;
inline int mid(){
return (l+r)>>1;
}
}tree[MAXN<<2];
inline void push(int rt){
if(tree[rt].lz){
tree[rt<<1].lz = tree[rt<<1|1].lz = 1;
tree[rt<<1].col = tree[rt<<1|1].col = tree[rt].col;
tree[rt].lz = 0;
}
}
void build(int l,int r,int rt){
tree[rt].l = l;
tree[rt].r = r;
tree[rt].lz = 0;
tree[rt].col = 0;
tree[rt].lz = 0;
if(l==r)return;
int mid = tree[rt].mid();
build(l,mid,rt<<1);
build(mid+1,r,rt<<1|1);
}
void modify(int l,int r,bool col,int rt){
if(l<=tree[rt].l&&tree[rt].r<=r){
tree[rt].lz = true;
tree[rt].col = col;
return;
}
push(rt);
int mid = tree[rt].mid();
if(r<=mid)modify(l,r,col,rt<<1);
else if(l>mid)modify(l,r,col,rt<<1|1);
else{
modify(l,r,col,rt<<1);
modify(l,r,col,rt<<1|1);
}
}
int ask(int pos,int rt){
if(tree[rt].l==tree[rt].r)
return tree[rt].col;
push(rt);
int mid = tree[rt].mid();
if(pos<=mid)return ask(pos,rt<<1);
else return ask(pos,rt<<1|1);
}
inline void lca(int x,int y){
while(top[x]!=top[y]){
if(dep[top[x]]<dep[top[y]])
swap(x,y);
modify( st[top[x]],st[x],0,1 );
x = fa[top[x]];
}
if(dep[x]>dep[y])swap(x,y);
modify(st[x],st[y],0,1);
}
int main(){
#ifndef ONLINE_JUDGE
freopen("sum.in","r",stdin);
//freopen("sum.out","w",stdout);
#endif
int n,m,x,y;
cin>>n;
REP(i,2,n){
RD2(x,y);
add(x,y);
add(y,x);
}
dfsFind(1,1,1);
Clear(use);
tim = 0;
dfsCon(1,1);
build(1,n,1);
RD(m);
while(m--){
RD2(y,x);
if(y==1)
modify( st[x],ed[x],1,1 );
else if(y==2)
lca(1,x);
else
printf("%d
",ask(st[x],1));
}
return 0;
}