Submission #860135

#	Time	Username	Problem	Language	Result	Execution time	Memory
860135		teamariaa	Speedrun (RMI21_speedrun)	C++17	60 / 100	89 ms	1896 KiB

speedrun

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

using namespace std;

#define MAX_N 1000

int n;
bitset <MAX_N + 1> viz;
vector <int> degree, last;

void setNumber(int poz, int x, int y)
{
    while(y)
    {
        if(y & 1)
            setHint(x, poz, 1);
        y >>= 1;
        poz --;
    }
}

int getNumber(int poz, int node)
{
    int start = poz - 10 + 1, nr = 0;
    for(int i = start; i <= poz; i ++)
    {
        nr <<= 1;
        nr += getHint(i);
    }
    return nr;
}


void dfs(int node, int parent)
{
    viz[node] = 1;
    for(int i = 1; i <= n; i ++)
        if(getHint(i)  &&  !viz[i])
        {
            goTo(i);
            dfs(i, node);
        }
    goTo(parent);
}

void dfs2(int node, int parent)
{
    viz[node] = 1;
    for(int i = 1; i <= 2; i ++)
    {
        int next = getNumber(i * 10, node);
        if(!viz[next]  &&  next)
        {
            goTo(next);
            dfs2(next, node);
        }
    }
    goTo(parent);
}

void dfs3(int node, int parent)
{
    cerr << node << endl;
    viz[node] = 1;
    if(getHint(316))
    {
        int sf = min(315, n);
        for(int i = 1; i <= sf; i ++)
        {
            if(getHint(i)  &&  !viz[i])
            {
                goTo(i);
                dfs3(i, node);
            }
        }

        for(int i = 316; i <= n; i ++)
        {
            if(!viz[i]  &&  goTo(i))
            {
                goTo(i);
                dfs3(i, node);
            }
        }
        goTo(parent);
    }
    else
    {
        int next = 1; // orice diferit de 0 ca sa intre in for
        for(int i = 1; i <= 31  &&  next; i ++)
        {
            next = getNumber(i * 10, node);
            if(!viz[next]  &&  next)
            {
                goTo(next);
                dfs3(next, node);
            }
        }
        goTo(parent);
    }
}

void assign1(int a[], int b[])
{
    setHintLen(n);
    for(int i = 1; i < n; i ++)
    {
        setHint(a[i], b[i], 1);
        setHint(b[i], a[i], 1);
    }
}

void assign2(int a[], int b[])
{
    if(n == 1)
        return;

    int center;
    degree.resize(n + 1, 0);
    setHintLen(10);

    for(int i = 1; i < n; i ++)
    {
        degree[a[i]] ++;
        degree[b[i]] ++;
        if(degree[a[i]] == 1)
        {
            center = b[i];
            setNumber(10 * degree[a[i]], a[i], b[i]);
        }

        if(degree[b[i]] == 1)
        {
            center = a[i];
            setNumber(10 * degree[b[i]], b[i], a[i]);
        }
    }

    for(int i = 1; i <= 10; i ++)
        setHint(center, i, 0);
}

void assign3(int a[], int b[])
{
    degree.resize(n + 1, 0);
    setHintLen(20);

    for(int i = 1; i < n; i ++)
    {
        degree[a[i]] ++;
        degree[b[i]] ++;
        setNumber(10 * degree[a[i]], a[i], b[i]);
        setNumber(10 * degree[b[i]], b[i], a[i]);
    }
}

void assign4(int a[], int b[])
{
    degree.resize(n + 1, 0);
    last.resize(n + 1, 0);
    setHintLen(316);

    for(int i = 1; i < n; i ++)
    {
        degree[a[i]] ++;
        degree[b[i]] ++;
    }

    for(int i = 1; i < n; i ++)
    {
        if(degree[a[i]] <= 31)
        {
            last[a[i]] ++;
            setNumber(10 * last[a[i]], a[i], b[i]);
        }
        else
        {
            setHint(a[i], 316, 1);
            if(b[i] < 316)
                setHint(a[i], b[i], 1);
        }


        if(degree[b[i]] <= 31)
        {
            last[b[i]] ++;
            setNumber(10 * last[b[i]], b[i], a[i]);
        }
        else
        {
            setHint(b[i], 316, 1);
            if(a[i] < 316)
                setHint(b[i], a[i], 1);
        }
    }
}

void speedrun1(int root)
{
    dfs(root, root);
}

void speedrun2(int root)
{
    int nr = getNumber(10, root), center = root;
    if(nr)
    {
        goTo(nr);
        center = nr;
    }

    for(int i = 1; i <= n ; i ++)
    {
        if(i != center)
        {
            goTo(i);
            goTo(center);
        }
    }

}

void speedrun3(int root)
{
    dfs2(root, root);
}

void speedrun4(int root)
{
    dfs3(root, root);
}

void assignHints(int subtask, int N, int A[], int B[])
{
    n = N;
    if(subtask == 1)
    {
        assign1(A, B);
        return;
    }
    if(subtask == 2)
    {
        assign2(A, B);
        return;
    }
    if(subtask == 3)
    {
        assign3(A, B);
        return;
    }

    assign4(A, B);
}

void speedrun(int subtask, int N, int start)
{
    n = N;
    if(subtask == 1)
    {
        speedrun1(start);
        return;
    }
    if(subtask == 2)
    {
        speedrun2(start);
        return;
    }
    if(subtask == 3)
    {
        speedrun3(start);
        return;
    }

    speedrun4(start);
}

Compilation message (stderr)

speedrun.cpp: In function 'void assign2(int*, int*)':
speedrun.cpp:141:16: warning: 'center' may be used uninitialized in this function [-Wmaybe-uninitialized]
  141 |         setHint(center, i, 0);
      |         ~~~~~~~^~~~~~~~~~~~~~

• Subtask 1: 21 / 21
• Subtask 2: 8 / 8
• Subtask 3: 19 / 19
• Subtask 4: 12 / 12
• Subtask 5: 0 / 40