Submission #538707

#	Time	Username	Problem	Language	Result	Execution time	Memory
538707		Jasiekstrz	Speedrun (RMI21_speedrun)	C++17	100 / 100	197 ms	844 KiB

speedrun

#include<bits/stdc++.h>
#include "speedrun.h"
using namespace std;
const int NN=1e3;
const int L=20;

vector<int> e[NN+10];
vector<int> pre,par;
void encode(int x,int c1,int c2)
{
	int c=(c1<<10)+c2;
	for(int i=1;i<=20;i++)
	{
		setHint(x,i,c%2);
		c/=2;
	}
	return;
}
void dfs(int x,int p)
{
	pre.push_back(x);
	par.push_back(p);
	for(auto v:e[x])
	{
		if(v!=p)
			dfs(v,x);
	}
	return;
}
void assignHints(int subtask, int N, int A[], int B[])
{
	setHintLen(L);
	for(int i=1;i<N;i++)
	{
		e[A[i]].push_back(B[i]);
		e[B[i]].push_back(A[i]);
	}
	dfs(1,0);
	pre.push_back(pre[0]);
	for(int i=0;i<N;i++)
		encode(pre[i],pre[i+1],par[i]);
	return;
}

pair<int,int> decode(int x)
{
	int ans=0;
	for(int i=20;i>=1;i--)
		ans=2*ans+getHint(i);
	return {(ans>>10),ans%(1<<10)};
}
void speedrun(int subtask, int N, int start)
{
	int x=start;
	while(x!=1)
	{
		x=decode(x).second;
		goTo(x);
	}
	for(int i=1;i<=N;i++)
	{
		int y=decode(x).first;
		while(!goTo(y))
		{
			x=decode(x).second;
			goTo(x);
		}
	}
	return;
}

• Subtask 1: 21 / 21
• Subtask 2: 8 / 8
• Subtask 3: 19 / 19
• Subtask 4: 12 / 12
• Subtask 5: 40 / 40