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Submission #347256

# Submission time Handle Problem Language Result Execution time Memory
347256 2021-01-12T12:37:50 Z blue Stations (IOI20_stations) C++17
0 / 100
 907 ms 1108 KB 
#include "stations.h"
#include <iostream>
#include <vector>
using namespace std;
 
vector<int> edge[1000];
vector<int> res(1000, -1);
vector<int> visit(1000, 0);
 
int dfs(int u, int a, bool flag) //return 1 + largest label yet created
{
    visit[u] = 1;
    if(flag == 0)
    {
        res[u] = a;
        a++;
    }
 
    for(int v: edge[u])
    {
        if(visit[v]) continue;
        a = dfs(v, a, !flag);
    }
 
    if(flag == 1)
    {
        res[u] = a;
        a++;
    }
 
    return a;
}
 
vector<int> label(int n, int k, vector<int> u, vector<int> v)
{
    for(int i = 0; i < n-1; i++)
    {
        edge[u[i]].push_back(v[i]);
        edge[v[i]].push_back(u[i]);
    }
 
    dfs(0, 0, 0);
 
    vector<int> temp(n);
    for(int i = 0; i < n; i++) temp[i] = res[i];
 
    return temp;
}
 
int find_next_station(int s, int t, vector<int> c)
{
    if(s < c[0]) // s is a left label
    {
        if(t < s) return c.back();
        for(int i = 0; i < c.size(); i++) if(t <= c[i]) return c[i];
    }
    else //s is a right label
    {
        if(t > s) return c.front();
        for(int i = c.size() - 1; i >= 0; i--) if(t >= c[i]) return c[i];
    }
}

Compilation message

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:55:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |         for(int i = 0; i < c.size(); i++) if(t <= c[i]) return c[i];
      |                        ~~^~~~~~~~~~
stations.cpp:62:1: warning: control reaches end of non-void function [-Wreturn-type]
   62 | }
      | ^

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 492 KB Invalid labels (values out of range). scenario=2, k=1000, vertex=10, label=-1
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 492 KB Invalid labels (values out of range). scenario=3, k=1000, vertex=996, label=-1
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 492 KB Invalid labels (values out of range). scenario=1, k=1000000, vertex=2, label=-1
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 907 ms 864 KB Output is correct
2 Incorrect 672 ms 1108 KB Wrong query response.
3 Halted 0 ms 0 KB -

Subtask #5
0 / 61.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 492 KB Invalid labels (values out of range). scenario=1, k=1000000000, vertex=3, label=-1
2 Halted 0 ms 0 KB -