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Submission #308278

# Submission time Handle Problem Language Result Execution time Memory
308278 2020-09-30T18:00:27 Z Peti Stations (IOI20_stations) C++14
0 / 100
 860 ms 1008 KB 
#include "stations.h"
#include <iostream>
#include <algorithm>
#include <vector>

using namespace std;

vector<vector<int>> g;
vector<bool> volt;

int ido = 0;
void Bejar(vector<int> &labels, int akt, int t)
{
    volt[akt] = true;

    if(t%2 == 0)
        labels[akt] = ido / 2;
    ido++;

    for(int x : g[akt])
        if(!volt[x])
            Bejar(labels, x, t+1);

    if(t%2 == 1)
        labels[akt] = ido / 2;
    ido++;
    return;
}

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
    ido = 0;
    volt.assign(n, false);
    g.assign(n, vector<int>());
    for(int i = 0; i < n-1; i++)
    {
        g[u[i]].push_back(v[i]);
        g[v[i]].push_back(u[i]);
    }

	std::vector<int> labels(n);

    Bejar(labels, 0, 0);

	return labels;
}

int find_next_station(int s, int t, std::vector<int> c) {

    sort(c.begin(), c.end());
    for(int i = 0; i < (int)c.size(); i++)
        c[i] *= 2;

    if(s < c[0])
    {
        if(t < s || t > (*c.rbegin()))
            return (*c.rbegin())/2;
        for(int x : c)
            if(x >= t)
                return x/2;
    }
    else
    {
        if(t > s || t <= c[0])
            return c[0]/2;
        reverse(c.begin(), c.end());
        for(int x : c)
            if(x <= t)
                return x/2;
    }

	return -1;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 520 ms 768 KB Wrong query response.
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 457 ms 952 KB Wrong query response.
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 526 ms 1008 KB Wrong query response.
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 860 ms 644 KB Output is correct
2 Incorrect 684 ms 644 KB Wrong query response.
3 Halted 0 ms 0 KB -

Subtask #5
0 / 61.0

# Verdict Execution time Memory Grader output
1 Incorrect 508 ms 1008 KB Wrong query response.
2 Halted 0 ms 0 KB -