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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#32858#866. Display of SpringsFroggyguaRE 4ms3692kbC++171.4kb2022-05-25 08:51:492022-05-25 08:51:52

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2022-05-25 08:51:52]
  • 评测
  • 测评结果:RE
  • 用时:4ms
  • 内存:3692kb
  • [2022-05-25 08:51:49]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
#define N 100010
typedef long long ll;
int n;
int Ask(int a,int b,int k){
	if(!b)return -1;
	if(!a)return 1;
	--a,--b;
	cout<<"? "<<a<<' '<<b<<' '<<k<<endl;
	string s;
	cin>>s;
	if(s=="FIRST")return -1;
	if(s=="SECOND")return 1;
	return 0;
}
void Report(int x){
	--x;
	cout<<"! "<<x<<endl;
}
class Segment_Tree{
	int Len;
	struct node{
		int p;
	}t[N<<2];
	#define ls u<<1
	#define rs u<<1|1
	void _ins(int u,int L,int R,int id){
		if(!id)return;
		if(L==R){
			if(!t[u].p||Ask(id,t[u].p,L)==-1){
				t[u].p=id;
				return;
			}
		}
		int mid=(L+R)>>1;
		if(Ask(id,t[u].p,mid)==-1){
			swap(id,t[u].p);
		}
		if(Ask(t[u].p,id,L)==1){
			_ins(ls,L,mid,id);
		}
		else{
			_ins(rs,mid+1,R,id);
		}
	}
	int _query(int u,int L,int R,int pos){
		if(L==R){
			return t[u].p;
		}
		int mid=(L+R)>>1;
		int ans=t[u].p;
		int x=pos<=mid?_query(ls,L,mid,pos):_query(rs,mid+1,R,pos);
		if(Ask(ans,x,pos)==1)ans=x;
		return ans;
	}
public:
	void init(int n,int _len){
		Len=_len;
		for(int i=1;i<=n;++i){
			_ins(1,1,Len,i);
		}
	}
	int Query(int p){
		return _query(1,1,Len,p);
	}
}T;
int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);
	cin>>n;
	T.init(n,100000);
	cout<<"!"<<endl;
	while(true){
		string opt;
		cin>>opt;
		if(opt=="FINISH")break;
		int x;
		cin>>x;
		Report(T.Query(x));
	}
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 1ms
memory: 3592kb

input:

3
FIRST
FIRST
FIRST
SECOND
QUESTION 2
SECOND
QUESTION 6
FIRST
FINISH

output:

? 1 0 50000
? 1 0 1
? 2 1 50000
? 2 1 1
!
? 2 1 2
! 1
? 2 1 6
! 2

result:

ok Correct answer

Test #2:

score: 0
Accepted
time: 4ms
memory: 3692kb

input:

6
FIRST
EQUAL
FIRST
SECOND
FIRST
SECOND
FIRST
SECOND
FIRST
SECOND
FIRST
SECOND
FIRST
SECOND
FIRST
SECOND
FIRST
SECOND
FIRST
SECOND
FIRST
SECOND
QUESTION 1
SECOND
SECOND
SECOND
SECOND
QUESTION 2
EQUAL
SECOND
SECOND
SECOND
QUESTION 3
FIRST
EQUAL
SECOND
SECOND
QUESTION 4
FIRST
FIRST
EQUAL
SECOND
QUESTI...

output:

? 1 0 50000
? 1 0 1
? 2 1 50000
? 2 1 1
? 3 2 50000
? 3 2 1
? 2 1 25000
? 2 1 1
? 4 3 50000
? 4 3 1
? 3 2 25000
? 3 2 1
? 2 1 12500
? 2 1 1
? 5 4 50000
? 5 4 1
? 4 3 25000
? 4 3 1
? 3 2 12500
? 3 2 1
? 2 1 6250
? 2 1 1
!
? 2 1 1
? 3 1 1
? 4 1 1
? 5 1 1
! 1
? 2 1 2
? 3 2 2
? 4 2 2
? 5 2 2
! 2
? 2 1 3...

result:

ok Correct answer

Test #3:

score: -100
Runtime Error

input:

326
SECOND
FIRST
SECOND
SECOND
FIRST
SECOND
FIRST
SECOND
SECOND
SECOND
SECOND
SECOND
FIRST
FIRST
SECOND
FIRST
SECOND
FIRST
SECOND
SECOND
SECOND
FIRST
SECOND
SECOND
SECOND
FIRST
SECOND
FIRST
FIRST
FIRST
FIRST
FIRST
FIRST
FIRST
SECOND
FIRST
SECOND
FIRST
FIRST
FIRST
FIRST
FIRST
SECOND
FIRST
FIRST
FIRST...

output:

? 1 0 50000
? 0 1 1
? 2 0 50000
? 0 2 1
? 3 0 50000
? 3 0 1
? 0 2 25000
? 0 2 1
? 4 3 50000
? 3 4 1
? 4 0 25000
? 0 4 1
? 4 2 12500
? 4 2 1
? 5 3 50000
? 3 5 1
? 5 1 75000
? 1 5 50001
? 6 3 50000
? 3 6 1
? 6 0 25000
? 0 6 1
? 7 3 50000
? 3 7 1
? 7 0 25000
? 0 7 1
? 7 6 37500
? 6 7 25001
? 8 3 50000
...

result: