Submission #642933

#	Time	Username	Problem	Language	Result	Execution time	Memory
642933		danikoynov	Speedrun (RMI21_speedrun)	C++14	100 / 100	161 ms	892 KiB

speedrun

/**
* user:  koynov-b21
* fname: Daniel Iliev
* lname: Koynov
* task:  Speedrun
* score: 100.0
* date:  2021-12-16 11:34:19.470183
*/
#include<bits/stdc++.h>
#include "speedrun.h"
using namespace std;


const int maxn = 1010;
vector < int > g[maxn], ch[maxn];
int deg[maxn], par[maxn], nxt[maxn];
vector < int > trav;
void assignDfs(int v, int p)
{
    trav.push_back(v);
    for (int i = 0; i < g[v].size(); i ++)
    {
        int u = g[v][i];
        if (u == p)
            continue;
        par[u] = v;
        assignDfs(u, v);
    }
}
void assignHints(int subtask, int N, int A[], int B[])
{
    setHintLen(20);
    for (int i = 1; i < N; i ++)
    {
        g[A[i]].push_back(B[i]);
        g[B[i]].push_back(A[i]);
        deg[A[i]] ++;
        deg[B[i]] ++;
    }

    assignDfs(1, -1);
    for (int i = 0; i < trav.size() - 1; i ++)
    {
        nxt[trav[i]] = trav[i + 1];
    }

    for (int i = 1; i <= N; i ++)
    {

        for (int j = 0; j < 10; j ++)
        {
            if ((par[i] & (1 << j)) > 0)
                setHint(i, j + 1, true);
        }

       for (int j = 0; j < 10; j ++)
       {

           if ((nxt[i] & (1 << j)) > 0)
            setHint(i, j + 11, true);
       }
    }
}


void getParent(int ver)
{
    par[ver] = 0;
    for (int bit = 0; bit < 10; bit ++)
        if (getHint(bit + 1))
            par[ver] += (1 << bit);
}

void speedrun(int subtask, int N, int start)
{
    int l = getLength();
    for (int i = 1; i <= N; i ++)
        par[i] = 0;

    int ver = start;
    while(ver != 1)
    {
        getParent(ver);
        goTo(par[ver]);
        ver = par[ver];
    }

    int cnt = 1;
    while(cnt < N)
    {
        int nxtn = 0;
        for (int bit = 0; bit < 10; bit ++)
            if (getHint(bit + 11))
            nxtn += (1 << bit);

        getParent(nxtn);
        while(!goTo(nxtn))
        {
            getParent(ver);
            goTo(par[ver]);
            ver = par[ver];
        }

        goTo(nxtn);
        ver = nxtn;
        cnt ++;
    }

}

Compilation message (stderr)

speedrun.cpp: In function 'void assignDfs(int, int)':
speedrun.cpp:21:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     for (int i = 0; i < g[v].size(); i ++)
      |                     ~~^~~~~~~~~~~~~
speedrun.cpp: In function 'void assignHints(int, int, int*, int*)':
speedrun.cpp:42:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |     for (int i = 0; i < trav.size() - 1; i ++)
      |                     ~~^~~~~~~~~~~~~~~~~
speedrun.cpp: In function 'void speedrun(int, int, int)':
speedrun.cpp:76:9: warning: unused variable 'l' [-Wunused-variable]
   76 |     int l = getLength();
      |         ^

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