Submission #139040

#	Time	Username	Problem	Language	Result	Execution time	Memory
139040		Mahdi_Jfri	Mechanical Doll (IOI18_doll)	C++14	100 / 100	167 ms	17432 KiB

doll

#include "doll.h"
#include<bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define bit(a , b) (((a)>>(b))&1)

const int maxn = 1e6 + 20;
const int maxb = 20;

int id , pt;
int x[maxn] , y[maxn];

vector<int> a , bits;

int build(int n)
{
	if(n == 0)
		return -1;

	int root = id++;
	x[root] = build(n - 1);
	y[root] = build(n - 1);

	return root;
}

int solve(int k , int n)
{
	if(n == (1 << k))
		return build(k);

	int root = id++;
	if(n <= (1 << (k - 1)))
	{
		x[root] = 0;
		y[root] = solve(k - 1 , n);
	}
	else
	{
		x[root] = build(k - 1);
		n -= (1 << (k - 1));
		y[root] = solve(k - 1 , n);
	}

	return root;
}

bool is[maxn];

void dfs(int v)
{
	while(pt < (int)a.size())
	{
		if(!is[v])
		{
			is[v] ^= 1;
			if(x[v] == -1)
			{
				x[v] = a[pt++] + maxn * 10 , v = 0;
			}
			else
			{
				v = x[v];
			}
		}
		else
		{
			is[v] ^= 1;
			if(y[v] == -1)
			{
				y[v] = a[pt++] + maxn * 10 , v = 0;
			}
			else
			{
				v = y[v];
			}
		}
	}
}

void create_circuit(int m, vector<int> A)
{
	memset(x , -1 , sizeof x);
	memset(y , -1 , sizeof y);

	if(A.size() == 1)
	{
		vector<int> shit , x;
		for(int i = 0; i <= m; i++)
			shit.pb(0);
		shit[0] = A[0];
		answer(shit , x , x);
		return;
	}

	a = A;
	a.pb(0);
	int n = a.size();

	for(int j = 0; j < 20; j++)
		if(bit(n , j))
			bits.pb(j);

	solve(bits.back() + 1 , n);

	dfs(0);

	for(int i = 0; i < id; i++)
	{
		int v = i;
		if(x[v] >= maxn * 10)
			x[v] = x[v] - maxn * 10;
		else
			x[v] = -x[v] - 1;

		if(y[v] >= maxn * 10)
			y[v] = y[v] - maxn * 10;
		else
			y[v] = -y[v] - 1;
	}

	vector<int> res;
	for(int i = 0; i <= m; i++)
		res.pb(-1);

	vector<int> X , Y;
	for(int i = 0; i < id; i++)
		X.pb(x[i]) , Y.pb(y[i]);
	answer(res , X , Y);
}

• Subtask 1: 2 / 2
• Subtask 2: 4 / 4
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 18 / 18
• Subtask 6: 56 / 56