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Submission #956764

# Submission time Handle Problem Language Result Execution time Memory
956764 2024-04-02T12:51:46 Z 12345678 Stations (IOI20_stations) C++17
0 / 100
 620 ms 684 KB 
#include "stations.h"
#include <bits/stdc++.h>

using namespace std;

const int nx=1e3+5;
int in[nx], out[nx], lvl[nx], cnt, pa;
vector<int> res, d[nx];

void dfs(int u, int p)
{
    in[u]=++cnt;
    lvl[u]=lvl[p]+1;
    for (auto v:d[u]) if (v!=p) dfs(v, u);
    out[u]=cnt;
    if (lvl[u]%2) res[u]=in[u];
    else res[u]=1000+out[u];
}

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
    cnt=-1;
    for (int i=0; i<n; i++) d[i].clear();
    res.resize(n);
    for (int i=0; i<n-1; i++) d[u[i]].push_back(v[i]), d[v[i]].push_back(u[i]);
    lvl[0]=0;
    dfs(0, 0);
	return res;
}

int find_next_station(int s, int t, std::vector<int> c) {
    if (c.size()==1) return c[0];
    if (t>=1000) t-=1000;
    if (s<1000)
    {
        for (auto &x:c) x-=1000;
        if (s==0) for (auto x:c) if (t<=x) return x+1000;
        pa=c.back();
        //cout<<"here "<<s<<' '<<pa<<' '<<t<<'\n';
        for (int i=0; i<c.size()-1; i++) if (s<=t&&t<=c[i]) return c[i]+1000;
        return pa+1000;
    }
    else
    {
        s-=1000;
        pa=c.front();
        for (int i=c.size()-1; i>0; i--) if (c[i]<=t&&t<=s) return c[i];
        return pa;
    }
}

Compilation message

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:39:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |         for (int i=0; i<c.size()-1; i++) if (s<=t&&t<=c[i]) return c[i]+1000;
      |                       ~^~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 580 KB Invalid labels (values out of range). scenario=0, k=1000, vertex=1, label=1009
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 552 KB Invalid labels (values out of range). scenario=0, k=1000, vertex=1, label=1511
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 604 KB Invalid labels (duplicates values). scenario=1, label=1863
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 620 ms 684 KB Output is correct
2 Correct 415 ms 684 KB Output is correct
3 Incorrect 0 ms 344 KB Invalid labels (duplicates values). scenario=1, label=1003
4 Halted 0 ms 0 KB -

Subtask #5
0 / 61.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 604 KB Invalid labels (duplicates values). scenario=1, label=1997
2 Halted 0 ms 0 KB -