Submission #118196

#	Time	Username	Problem	Language	Result	Execution time	Memory
118196		scanhex	Meetings (JOI19_meetings)	C++17	100 / 100	1728 ms	8292 KiB

meetings

#include "meetings.h"
#ifdef ONPC
#include "grader.h"
#endif
#include<bits/stdc++.h>
using namespace std;

map<vector<int>,int>mp;
int que(int a,int b,int c){
	vector<int>v={a,b,c};
	sort(v.begin(),v.end());
	if(mp.count(v))return mp[v];
	return mp[v]=Query(v[0],v[1],v[2]);
}
using uint=unsigned int;
uint seed=239239239;
uint xrand(){
	seed^=seed<<2;
	seed^=seed>>7;
	seed^=seed<<7;
	return seed;
}
mt19937 rnd(228);
void solve(vector<int>v){
//	cerr<<v.size()<<'\n';
//	for(auto&x:v)
//		cerr<<x<<' ';
//	cerr<<'\n';
	if(v.size()<=1)return;
	shuffle(v.begin(),v.end(),rnd);
	int kek=v[0];
	if(v.size()>=100){
		kek=que(v[0],v[1],v[2]);
		swap(v[0],*find(v.begin(),v.end(),kek));
	}
	int cur=v[1];
	vector<int>nw={};
	for(int x:v){
		if(x==kek)continue;
		if(x==cur){
			nw.push_back(x);
			continue;
		}
		int mem=que(x,cur,kek);
		if(mem==kek)
			;
		else if(mem==cur)
			nw.push_back(x);
		else
			nw.push_back(x),cur=mem;
	}
	Bridge(min(kek,cur),max(kek,cur));
	solve(nw);
	set<int>nw1(nw.begin(),nw.end());
	vector<int>other;
	for(int x:v)
		if(!nw1.count(x))other.push_back(x);
	solve(other);
}
void Solve(int n) {
	mp.clear();
	vector<int>ord(n);
	iota(ord.begin(),ord.end(),0);
	solve(ord);
}

• Subtask 1: 7 / 7
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 71 / 71