Submission #1225735

#	Time	Username	Problem	Language	Result	Execution time	Memory
1225735		_rain_	Long Mansion (JOI17_long_mansion)	C++20	10 / 100	114 ms	38888 KiB

long_mansion

#include<bits/stdc++.h>
using namespace std;
typedef long long LL;

const int N=(int)5e5;
	int x[N+2],y[N+2],c[N+2],b[N+2];
	vector<int>arr[N+2];
	int n,q;
	
namespace subtask1{
	bool check(){
		return n<=5000;
	}
	
	const int LIMIT=5000;
	bool f[LIMIT+2][LIMIT+2];
	bool cnt[N+2]={};
	
	void main_code(){
		for(int i =1;i<=n;++i){
			for(int j=0;j<=n;++j) cnt[j]=false;
			int l=i,r=i;
			bool nxt=true;
			for(auto&x:arr[i]) cnt[x]=true;
			while (nxt){
				nxt=false;
				while (r<n && cnt[c[r]]){
					for(auto&x:arr[r+1]) cnt[x]=true;
					f[i][r+1]=true;
					nxt=true;
					++r;
				}
				while (l>1 && cnt[c[l-1]]){
					for(auto&x:arr[l-1]) cnt[x]=true;
					f[i][l-1]=true;
					nxt=true;
					--l;	
				}
			}
		}
		for(int i=1;i<=q;++i){
			cout<<(f[x[i]][y[i]]?"YES":"NO")<<'\n';
		}
	}
}

namespace subtatsk2{
	bool check(){
		return *max_element(c+1,c+n+1)<=20;
	}
	void main_code(){
		for(int i=1;i<=n;++i){
			
		}
	}
}

int main(){
	ios::sync_with_stdio(false);
	cin.tie(0) ; cout.tie(0);
	#define task "main"
	if (fopen(task".inp","r")){
		freopen(task".inp","r",stdin);
		freopen(task".out","w",stdout);
	}
	
	cin>>n;
	for(int i=1;i<n;++i) cin>>c[i];
	for(int i=1;i<=n;++i){
		cin>>b[i];
		arr[i].resize(b[i]);
		for(auto&x:arr[i]) cin>>x;
	}
	cin>>q;
	for(int i=1;i<=q;++i) cin>>x[i]>>y[i];
	if (subtask1::check()){
		return subtask1::main_code(),0;
	}
	return 0;
}

Compilation message (stderr)

long_mansion.cpp: In function 'int main()':
long_mansion.cpp:63:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |                 freopen(task".inp","r",stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
long_mansion.cpp:64:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |                 freopen(task".out","w",stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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