Submission #1362165

#TimeUsernameProblemLanguageResultExecution timeMemory
1362165WH8Long Mansion (JOI17_long_mansion)C++17
25 / 100
3093 ms84040 KiB
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
using namespace std;
using namespace __gnu_pbds;
#define g0(x) get<0>(x)
#define g1(x) get<1>(x)
#define g2(x) get<2>(x)
#define mt make_tuple
#define mp make_pair
#define int long long 
#define f first
#define s second
#define pll pair<long long, long long>
#define iii tuple<int,int,int>
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define pb push_back

signed main(){
	int n;cin>>n;
	vector<int> ed(n+1, 0);
	vector<vector<int>> keys(n+1);
	for(int i=1;i<=n-1;i++){
		cin>>ed[i];
	}
	for(int i=1;i<=n;i++){
		int k;cin>>k;
		for(int j=0;j<k;j++){
			int cur;cin>>cur;
			keys[i].pb(cur);
		}
	}
	vector<int> nblk(n+1, n+1), nkey(n+1, 1e15), rightonly(n+1, 0), rreq(n+1, 1e15);
	iota(all(rightonly), 0);
	multiset<int> ms;
	for(int i=1;i<=n;i++) ms.insert(n+1);
	for(int i=n;i>=1;i--){
		for(auto key : keys[i]){
			if(nblk[key] != n+1) {
				ms.erase(ms.find(nblk[key]));
				nblk[key] = n+1;
				ms.insert(n+1);
			}
			nkey[key]=i;
		}
		rightonly[i]=*ms.begin();
		rreq[i-1]=nkey[ed[i-1]];
		if(i != 1) ms.erase(ms.find(nblk[ed[i-1]]));
		nblk[ed[i-1]]=i-1;
		ms.insert(i-1);
	}
	vector<int> lreq(n+1, -1e15);
	fill(all(nblk), 0); fill(all(nkey), -1e15);
	ms.clear();
	for(int i=1;i<=n;i++) ms.insert(0);
	for(int i=1;i<=n;i++){
		for(auto key : keys[i]){
			if(nblk[key] != 0) {
				ms.erase(ms.find(nblk[key]));
				nblk[key] = 0;
				ms.insert(0);
			}
			nkey[key]=i;
		}
		lreq[i]=nkey[ed[i]];
		if(i != n) ms.erase(ms.find(nblk[ed[i]]));
		nblk[ed[i]]=i;
		ms.insert(i);
	}

	/*for(int i=1;i<=n;i++){
		printf("i %lld lreq %lld, rreq %lld\n", i, lreq[i], rreq[i]);
	}*/
	vector<int> l(n+1), r(n+1);
	iota(all(l), 0);
	iota(all(r), 0);
	for(int i=1;i<=n;i++){
		int cl=i, cr=rightonly[i];
		while(rreq[cl-1] <= cr){
			cr=max(r[cl-1], cr);
			cl=min(l[cl-1], cl);
			while(lreq[cr] >= cl){
				cr++;
			}
		}
		l[i]=cl, r[i]=cr;
	}
	/*for(int i=1;i<=n;i++){
		printf("i %lld l %lld, r %lld\n", i, l[i], r[i]);
	}*/
	int q;cin>>q;
	for(int qind=0;qind<q;qind++){
		int s, t;cin>>s>>t;
		if(l[s] <= t and t <= r[s]){
			cout<<"YES\n";
		}
		else cout<<"NO\n";
	}
}
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