Submission #348573

#	Time	Username	Problem	Language	Result	Execution time	Memory
348573		arnold518	Meandian (CEOI06_meandian)	C++14	100 / 100	7 ms	492 KiB

meandian

#include "libmean.h"
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 100;

int N, ans[MAXN+10];
	
map<vector<int>, int> M;
int query(int a, int b, int c, int d)
{
	vector<int> V={a, b, c, d};
	sort(V.begin(), V.end());
	if(M.find(V)!=M.end()) return M[V];
	M[V]=Meandian(a, b, c, d)*2;
	return M[V];
}

int main()
{
	N=Init();

	if(N==4)
	{
		for(int i=0; i<4; i++) ans[i]=-1;
		Solution(ans);
		return 0;
	}

	int a[5]={0, 1, 2, 3, 4};
	for(int i=5; i<=N; i++)
	{
		int p=query(i, a[2], a[3], a[4]);
		int q=query(a[1], i, a[3], a[4]);
		int r=query(a[1], a[2], i, a[4]);
		int s=query(a[1], a[2], a[3], i);

		vector<pii> V;
		V.push_back({p, a[1]});
		V.push_back({q, a[2]});
		V.push_back({r, a[3]});
		V.push_back({s, a[4]});

		sort(V.begin(), V.end());

		a[4]=V[0].second;
		a[3]=V[1].second;
		a[2]=V[2].second;
		a[1]=V[3].second;
		if(V[0].first==V[1].first && V[2].first==V[3].first) continue;
		if(V[0].first==V[1].first)
		{
			a[2]=i;
		}
		if(V[2].first==V[3].first)
		{
			a[3]=i;
		}
	}

	ans[a[1]]=-1;
	ans[a[2]]=-1;
	ans[a[3]]=-1;
	ans[a[4]]=-1;

	for(int i=1; i<=N; i++)
	{
		if(ans[i]==-1) continue;

		int p=query(i, a[2], a[3], a[4]);
		int q=query(a[1], i, a[3], a[4]);
		int r=query(a[1], a[2], i, a[4]);
		int s=query(a[1], a[2], a[3], i);
		vector<int> V={p, q, r, s};
		sort(V.begin(), V.end());
		V.erase(unique(V.begin(), V.end()), V.end());

		int u=V[0], v=query(a[1], a[2], a[3], a[4]), w=V[1];
		ans[i]=(u+v+w)/2-v;
	}

	for(int i=1; i<=N; i++) ans[i-1]=ans[i];
	Solution(ans);
}

• Subtask 1: 100 / 100