Submission #538088

#	Time	Username	Problem	Language	Result	Execution time	Memory
538088		huangqr	Library (JOI18_library)	C++14	0 / 100	49 ms	336 KiB

library

#include <cstdio>
#include <vector>
#include "library.h"

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

void Solve(int N)
{
	vector<int>M(N,1);
	vector<int>ans;
	unordered_set<int>unknown;
	for(int i=1;i<=N;i++)unknown.insert(i);
	for(int i=0;i<N;i++){//Locating an edge, letting it be L
		M[i]=0;
		if(Query(M)==1){
			ans.push_back(i+1);
			unknown.erase(i+1);
			break;
		}
		M[i]=1;
	}
	if(ans.empty())Answer(ans);
	while((int)ans.size()<N){
		/*cout<<"ans: ";
		for(auto x:ans)cout<<x<<" ";
		cout<<"\n";*/
		unordered_set<int>space=unknown,a,b;
		while(space.size()>1){
			/*cout<<"space: ";
			for(auto x:space)cout<<x<<" ";
			cout<<"\n";*/
			int halfsize=space.size()/2;
			auto it=space.begin();
			for(int i=0;i<halfsize;i++){
				a.insert(*it);
				it++;
			}
			for(int i=halfsize;i<(int)space.size();i++){
				b.insert(*it);
				it++;
			}
			/*cout<<"a: ";
			for(auto x:a)cout<<x<<" ";
			cout<<"\n";
			cout<<"b: ";
			for(auto x:b)cout<<x<<" ";
			cout<<"\n";*/
			M=vector<int>(N,0);
			for(auto x:a)M[x-1]=1;
			int pre = Query(M);
			M[ans.back()-1]=1;
			int aft = Query(M);
			if(pre==aft)space=a;
			else space=b;
			a.clear();
			b.clear();
		}
		ans.push_back(*(space.begin()));
		unknown.erase(*(space.begin()));
	}
	Answer(ans);
}

• Subtask 1: 0 / 19
• Subtask 2: 0 / 81