Submission #692545

#	Time	Username	Problem	Language	Result	Execution time	Memory
692545		Antekb	Long Mansion (JOI17_long_mansion)	C++14	25 / 100	3070 ms	50500 KiB

long_mansion

#include<bits/stdc++.h>
 
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("trapv")
 
#define st first
#define nd second
#define pb push_back
#define eb emplace_back
#define pp(x) pop_back(x)
#define mp(a, b) make_pair(a, b)
#define all(x) (x).begin(), (x).end()
#define rev(x) reverse(all(x))
#define sor(x) sort(all(x))
#define sz(x) (int)(x).size()
#define rsz(x) resize(x)
 
using namespace std;
 
///~~~~~~~~~~~~~~~~~~~~~~~~~~
 
template <typename H, typename T> 
ostream& operator<<(ostream& os, pair<H, T> m){
	return os <<"("<< m.st<<", "<<m.nd<<")";
}
template <typename H> 
ostream& operator<<(ostream& os, vector<H> V){
	os<<"{";
	for(int i=0; i<V.size(); i++){
		if(i)os<<" ";
		os<<V[i];
	}
	os<<"}";
	return os;
}
 
void debug(){cerr<<"\n";}
template <typename H, typename... T>
void debug(H h, T... t) {cerr<<h; if (sizeof...(t)) cerr << ", "; debug(t...);}
#define deb(x...) cerr<<#x<<" = ";debug(x);
//#define deb(x...) ;
 
///~~~~~~~~~~~~~~~~~~~~~~~~~
 
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<pii > vii;
typedef vector<ll> vl;
typedef vector<pll> vll;
typedef string str;

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
template <typename T>
using ordered_set =
    tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

 
#define BOOST ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
 
//mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
 
const int N=1<<19, INF=1e9+5, mod=1e9+7, mod2=998244353;

struct modint{
	int n=0;
	modint(){}
	modint(ll x){
		n=x%mod;
		if(n<0)n+=mod;
	}
	operator int(){
		return n;
	}
	modint operator+(modint a){a.n = n+a.n; if(a.n>=mod)a.n-=mod;return a;}
	modint operator+=(modint a){return (*this)=(*this)+a;}
	modint operator-(modint a){a.n = n-a.n; if(a.n<0)a.n+=mod;return a;}
	modint operator-=(modint a){return (*this)=(*this)-a;}
	modint operator*(modint a){a.n = (n*1ll*a.n)%mod; return a;}
	modint operator*=(modint a){return (*this)=(*this)*a;}
	modint operator^(const ll &m)const{
		modint a(1);
		if(m==0)return a;
		if(m==1)return (*this);
		a=(*this)^(m/2);
		a*=a;
		return a*((*this)^(m&1));
	}
	modint odw(){
		return (*this)^((ll)mod-2);
	}
	modint operator/(modint a){return (*this)*a.odw();}
	modint operator/=(modint a){return (*this)=(*this)/a;}
	bool operator==(modint a){return a.n==n;}
	friend ostream& operator<<(ostream& os, modint m) {
		return os << m.n; 
	}
};
modint fact[N], fact2[N];
typedef vector<modint> vm;
void factinit(){
    fact[0]=1;
    for(int i=1; i<N; i++){
        fact[i]=(fact[i-1]*modint(i))%mod;
    }
    fact2[N-1]=fact[N-1].odw();
    for(int i=N-2; i>=0; i--){
    	fact2[i]=(fact2[i+1]*modint(i+1))%mod;
    }
}
modint npok(int _n, int _k){
    return fact[_n]*fact2[_k]*fact2[_n-_k];
}
int co[N], vis[N];
vi gdzie[N];
int L[N], R[N];
int r[N];
int find(int v){
	if(v==r[v])return v;
	return r[v]=find(r[v]);
}
void Union(int a, int b){
	a=find(a);
	b=find(b);
	r[a]=b;
}
void dfs(int v){
	vis[v]=1;
	L[v]=R[v]=v;
	r[v]=v;
	while(true){
		int RR=R[find(v)], LL=L[find(v)];
		if(lower_bound(all(gdzie[co[LL-1]]), LL)!=upper_bound(all(gdzie[co[LL-1]]), RR)){
			L[find(v)]=L[find(LL-1)];
			if(vis[LL-1]==1 && find(v)!=find(LL-1)){
				Union(v, LL-1);
				R[find(v)]=R[v];
			}
		}
		if(lower_bound(all(gdzie[co[RR]]), LL)!=upper_bound(all(gdzie[co[RR]]), RR)){
			if(vis[RR+1]==0){
				dfs(RR+1);
			}
			R[find(v)]=R[find(RR+1)];
		}
		if(RR==R[find(v)] && LL==L[find(v)])break;
	}
	vis[v]=2;
}
int main(){
	//factinit();
	//BOOST;
	int n;
	cin>>n;
	for(int i=1; i<n; i++){
		cin>>co[i];
	}
	for(int i=1; i<=n; i++){
		int k;
		cin>>k;
		for(int j=0; j<k; j++){
			int  x;
			cin>>x;
			gdzie[x].pb(i);
		}
	}
	for(int i=1; i<=n; i++){
		if(!vis[i])dfs(i);
	}
	for(int i=1; i<=n; i++){
		deb(find(i), L[find(i)], R[find(i)]);
	}
	int q;
	cin>>q;
	while(q--){
		int x, y;
		cin>>x>>y;
		if(y>R[find(x)] || y<L[find(x)]){
			cout<<"NO\n";
		}
		else cout<<"YES\n";
	}
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 15 / 15
• Subtask 4: 0 / 75