Submission #966990

#	Time	Username	Problem	Language	Result	Execution time	Memory
966990		AtabayRajabli	Speedrun (RMI21_speedrun)	C++17	100 / 100	69 ms	2364 KiB

speedrun

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

using namespace std;

const int sz = 2005;
int cnt, num, in[sz], t[sz], p[sz];
vector<int> g[sz];

void dfs(int v)
{
    in[v] = ++cnt;
    t[in[v]] = v;
    for(int i : g[v])
    {
        if(!in[i])
        {
            p[i] = v;
            dfs(i);
        }
    }
}

void assignHints(int subtask, int N, int A[], int B[])
{
    for(int i = 1; i < N; i++)
    {
        g[A[i]].push_back(B[i]);
        g[B[i]].push_back(A[i]);
    }
    setHintLen(20);
    dfs(1);
    for(int i = 1; i <= N; i++)
    {
        int nxt = t[in[i] + 1];
        int prv = p[i];
        if(nxt == 0)nxt = 1;
        for(int j = 0; j < 10; j++)
        {
            if(prv & (1 << j)) setHint(i, (j + 11), 1);
            if(nxt & (1 << j)) setHint(i, (j + 1), 1);
        }
    }
}

void f(int go, int N)
{
    if(num == N)return;
    int nxt = 0, prv = 0;
    for(int i = 0; i < 10; i++)
    {
        nxt += getHint(i + 1) * (1 << i);
        prv += getHint(i + 11) * (1 << i);
    }
    if(go)
    {
        if(!goTo(go))
        {
            //cout << "could not go to " << go << ", went to " << prv << endl;
            goTo(prv);
            f(go, N);
        }
        else
        {
            num++;
            //cout << "went to " << go << endl;
            f(0, N);
        }
    }
    else
    {
        if(!goTo(nxt))
        {
            goTo(prv);
            //cout << "could not go to " << nxt << ", went to " << prv << endl;
            f(nxt, N);
        }
        else
        {
            //cout << "went to " << nxt << endl;
            num++;
            f(0, N);
        }
    }
}

void speedrun(int subtask, int N, int start)
{
    num = 1;
    f(0, N);
}

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