結果

問題 No.1790 Subtree Deletion
コンテスト
ユーザー HIR180
提出日時 2021-12-21 01:07:21
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 171 ms / 3,000 ms
コード長 7,898 bytes
コンパイル時間 2,782 ms
コンパイル使用メモリ 198,584 KB
最終ジャッジ日時 2025-01-27 04:22:23
ジャッジサーバーID
（参考情報） 		judge5 / judge4
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 12
権限があれば一括ダウンロードができます

ソースコード

diff # 

//Let's join Kaede Takagaki Fan Club !!
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <cmath>
#include <ctime>
#include <cassert>
#include <string>
#include <algorithm>
#include <vector>
#include <queue>
#include <stack>
#include <functional>
#include <iostream>
#include <map>
#include <set>
#include <unordered_map>
#include <unordered_set>
#include <cassert>
#include <iomanip>
#include <chrono>
#include <random>
#include <bitset>
#include <complex>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
#define int long long
//#define L __int128
typedef long long ll;
typedef pair<int,int> P;
typedef pair<int,P> P1;
typedef pair<P,P> P2;
#define pu push
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define eps 1e-7
#define INF 1000000000
#define a first
#define b second
#define fi first
#define sc second
#define rng(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define rep(i,x) for(int i=0;i<x;i++)
#define repn(i,x) for(int i=1;i<=x;i++)
#define SORT(x) sort(x.begin(),x.end())
#define ERASE(x) x.erase(unique(x.begin(),x.end()),x.end())
#define POSL(x,v) (lower_bound(x.begin(),x.end(),v)-x.begin())
#define POSU(x,v) (upper_bound(x.begin(),x.end(),v)-x.begin())
#define all(x) x.begin(),x.end()
#define si(x) int(x.size())
 
#ifdef LOCAL
#define dmp(x) cerr<<__LINE__<<" "<<#x<<" "<<x<<endl
#else
#define dmp(x) void(0)
#endif
 
template<class t,class u> bool chmax(t&a,u b){if(a<b){a=b;return true;}else return false;}
template<class t,class u> bool chmin(t&a,u b){if(b<a){a=b;return true;}else return false;}
 
template<class t> using vc=vector<t>;
 
template<class t,class u>
ostream& operator<<(ostream& os,const pair<t,u>& p){
	return os<<"{"<<p.fi<<","<<p.sc<<"}";
}
 
template<class t> ostream& operator<<(ostream& os,const vc<t>& v){
	os<<"{";
	for(auto e:v)os<<e<<",";
	return os<<"}";
}
 
 //https://codeforces.com/blog/entry/62393
struct custom_hash {
	static uint64_t splitmix64(uint64_t x) {
		// http://xorshift.di.unimi.it/splitmix64.c
		x += 0x9e3779b97f4a7c15;
		x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
		x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
		return x ^ (x >> 31);
	}
 
	size_t operator()(uint64_t x) const {
		static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
		return splitmix64(x + FIXED_RANDOM);
	}
	
	size_t operator()(pair<int,int> x)const{
		return operator()(uint64_t(x.first)<<32|x.second);
	}
};
//unordered_set -> dtype, null_type
//unordered_map -> dtype(key), dtype(value)
using namespace __gnu_pbds;
template<class t,class u>
using hash_table=gp_hash_table<t,u,custom_hash>;

template<class T>
void g(T &a){
	cin >> a;
}
template<class T>
void o(const T &a,bool space=false){
	cout << a << (space?' ':'\n');
}
//ios::sync_with_stdio(false);
const ll mod = 998244353;
//const ll mod = 1000000007;
mt19937_64 mt(chrono::steady_clock::now().time_since_epoch().count());
template<class T>
void add(T&a,T b){
	a+=b;
	if(a >= mod) a-=mod;
}
ll modpow(ll x,ll n){
	ll res=1;
	while(n>0){
		if(n&1) res=res*x%mod;
		x=x*x%mod;
		n>>=1;
	}
	return res;
}
#define _sz 1
ll F[_sz],R[_sz];
void make(){
	F[0] = 1;
	for(int i=1;i<_sz;i++) F[i] = F[i-1]*i%mod;
	R[_sz-1] = modpow(F[_sz-1], mod-2);
	for(int i=_sz-2;i>=0;i--) R[i] = R[i+1] * (i+1) % mod;
}
ll C(int a,int b){
	if(b < 0 || a < b) return 0;
	return F[a]*R[b]%mod*R[a-b]%mod;
}
#define SZ 200005
int n;
vector<P>edge[SZ];
int up[20][SZ],dep[SZ], in[SZ], out[SZ], val[SZ];

struct dbling{
	bool ready = 0;
	int id = 0;
	void dfs(int v,int u,int d,int upp){
		up[0][v] = u; dep[v] = d;
		in[v] = id++;
		if(u != -1) val[in[v]] = upp;
		//cout<<in[v]<<" "<<upp<<endl;
		rep(i,edge[v].size()){
			if(edge[v][i].a == u) continue;
			dfs(edge[v][i].a, v, d+1, edge[v][i].b);
		}
		out[v] = id-1;
	}
	void prepare(){
	    dfs(1,-1,0,0);
		rep(j,19){
			rep(i,SZ){
				if(up[j][i] == -1) up[j+1][i] = up[j][i];
				else up[j+1][i] = up[j][up[j][i]];
			}
		}
		ready = 1;
	}
	int get(int a,int b){
		if(dep[a] > dep[b]) swap(a,b);
		int D = dep[b]-dep[a];
		rep(i,20){
			if(((D>>i)&1)) b = up[i][b];
		}
		if(a == b) return a;
		for(int i=19;i>=0;i--){
			if(up[i][a] != up[i][b]){
				a = up[i][a];
				b = up[i][b];
			}
		}
		return up[0][a];
	}
	int dist(int a,int b){
		int c = get(a,b);
		return dep[a]+dep[b]-2*dep[c];
	}
	int dist(int a,int b,int c){
		//assuming c is lca of (a,b)
		return dep[a]+dep[b]-2*dep[c];
	}
	int go_up(int v,int a){
	    if(dep[v] < a) return -1;
	    rep(i,20) if(((a>>i)&1)) v = up[i][v];
	    return v;
	}
	//a ---- b
	//と並べたときのx番目 (1-indexed)
	//存在しない場合は-1を返す
	//verified : opencup Warsaw I
	int v_on_path(int a,int b,int x){
		int c = get(a,b);
		int d = dist(a,b,c);
		if(x <= 0 || x > d+1) return -1;
		if(x <= dep[a]-dep[c]+1){
			return go_up(a, x-1);
		}
		else{
			x = d+2-x;
			return go_up(b, x-1);
		}
	}
}kaede;
template<typename F, typename T>
struct segtree{
	int sz;
	vector<T>seg;
	const F f;
	const T e;
	segtree(int n, const F f, const T e): f(f), e(e) {
		sz = 1;
		while(sz < n) sz <<= 1;
		seg.assign(2*sz, e);
	}
	void init(int n){
		sz = 1;
		while(sz < n) sz <<= 1;
		seg.assign(2*sz, e);
	}
	//mrg...apply f or not
	void update(int a, T p, bool mrg){
		a += sz-1;
		if(mrg) seg[a] = f(seg[a], p);
		else seg[a] = p;
		while(a){
			a = (a-1)/2;
			seg[a] = f(seg[a*2+1], seg[a*2+2]);
		}
	}
	void make(vector<T>a){
		rep(i, a.size()) seg[i+sz-1] = a[i];
		for(int i=sz-2;i>=0;i--) seg[i] = f(seg[i*2+1], seg[i*2+2]);
	}
	T query(int a, int b){
		a += sz-1, b += sz-1;
		T L = e, R = e;
		while(a <= b){
			if((a&1) == 0) { L = f(L, seg[a++]); }
			if((b&1) == 1) { R = f(seg[b--], R); }
			if(a > b) break;
			a = (a-1) >> 1;
			b = (b-1) >> 1;
		}
		return f(L, R);
	}
	int find_left(int a, int b, int k, int l, int r, T v){
		if(r < a || b < l) return INF;
		if(a <= l && r <= b){
			if(f(seg[k], v) == seg[k]){
				while(k < sz-1){
					if(f(seg[k*2+1], v) == seg[k*2+1]) k = k*2+1;
					else k = k*2+2;
				}
				return k - (sz-1);
			}
			return INF;
		}
		int ret = find_left(a, b, k*2+1, l, (l+r)/2, v);
		if(ret != INF) return ret;
		return find_left(a, b, k*2+2, 1+(l+r)/2, r, v);
	}
	//NOT VERIFIED
	int find_right(int a, int b, int k, int l, int r, T v){
		if(r < a || b < l) return -INF;
		if(a <= l && r <= b){
			if(f(seg[k], v) == seg[k]){
				while(k < sz-1){
					if(f(seg[k*2+2], v) == seg[k*2+2]) k = k*2+2;
					else k = k*2+1;
				}
				return k - (sz-1);
			}
			return -INF;
		}
		int ret = find_right(a, b, k*2+2, 1+(l+r)/2, r, v);
		if(ret != -INF) return ret;
		return find_right(a, b, k*2+1, l, (l+r)/2, v);
	}
	//[a, b]でf(*, v)=*となる最小の*を返す 無ければINF
	int find_left(int a, int b, T v){
		return find_left(a, b, 0, 0, sz-1, v);
	}
	//NOT VERIFIED
	//[a, b]でf(*, v)=*となる最大の*を返す 無ければ-INF
	int find_right(int a, int b, T v){
		return find_right(a, b, 0, 0, sz-1, v);
	}
	
};
//グローバルにおきたい時は
//f, eを定義して
auto f = [](int a, int b){ return a^b; };
int e = 0;
segtree<decltype(f), decltype(e)>seg((1<<17), f, e);
void solve(){
	cin>>n;
	rep(i, n-1){
		int a, b, c; cin>>a>>b>>c;
		edge[a].eb(b, c);
		edge[b].eb(a, c);
	}
	kaede.prepare();
	for(int i=1;i<n;i++) seg.update(i, val[i], true);
	
	set<int>zan;
	for(int i=1;i<n;i++) zan.insert(i);
	int q; cin >> q;
	while(q--){
		int t, x; cin >> t >> x;
		if(t == 1){
			int beg = in[x], en = out[x];
			auto it = zan.lower_bound(beg);
			while(it != zan.end() and (*it) <= en){
				seg.update(*it, 0, false);
				it = zan.erase(it);
			}
		}
		else{
			int beg = in[x]+1, en = out[x];
			o(seg.query(beg, en));
		}
	}
}
signed main(){
	cin.tie(0);
	ios::sync_with_stdio(0);
	cout<<fixed<<setprecision(20);
	int t; t = 1; //cin >> t;
	while(t--) solve();
}
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