Submission #858916

#	Time	Username	Problem	Language	Result	Execution time	Memory
858916		teamariaa	Speedrun (RMI21_speedrun)	C++17	48 / 100	60 ms	1788 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;

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

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()
{

}

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

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 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 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)
        {
//            cerr << next << "  sad" << endl;
            goTo(next);
            dfs2(next, node);
        }
    }
//    cerr << node << " " << parent << "  sad" << endl;
    goTo(parent);

}

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

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;
    }
}

Compilation message (stderr)

speedrun.cpp: In function 'void assign2(int*, int*)':
speedrun.cpp:60:16: warning: 'center' may be used uninitialized in this function [-Wmaybe-uninitialized]
   60 |         setHint(center, i, 0);
      |         ~~~~~~~^~~~~~~~~~~~~~

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