oj.uz

Submission #956799

# Submission time Handle Problem Language Result Execution time Memory
956799 2024-04-02T13:22:54 Z 12345678 Stations (IOI20_stations) C++17
0 / 100
 569 ms 1016 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, t1, t2;
vector<int> res, d[nx];
map<int, pair<int, int>> mp;

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]=2000+out[u];
}

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
    cnt=-1;
    t1=t2=0;
    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);
    for (int i=0; i<n; i++)
    {
        if (res[i]>=2000) mp[res[i]-2000]={i, 1};
        else mp[res[i]]={i, 0};
    }
    for (auto [x, y]:mp)
    {
        if (y.second) res[y.first]=x+t1+500, t1++;
        else res[y.first]=x+t2, t2++;
    }
	return res;
}

int find_next_station(int s, int t, std::vector<int> c) {
    if (c.size()==1) return c[0];
    if (t>=500) t-=500;
    if (s<500)
    {
        for (auto &x:c) x-=500;
        if (s==0) for (auto x:c) if (t<=x) return x+500;
        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]+500;
        return pa+500;
    }
    else
    {
        s-=500;
        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:51:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |         for (int i=0; i<c.size()-1; i++) if (s<=t&&t<=c[i]) return c[i]+500;
      |                       ~^~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 648 KB Invalid labels (values out of range). scenario=2, k=1000, vertex=1, label=2986
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 608 KB Invalid labels (values out of range). scenario=0, k=1000, vertex=1, label=1862
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 359 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 569 ms 684 KB Output is correct
2 Correct 444 ms 684 KB Output is correct
3 Correct 379 ms 684 KB Output is correct
4 Correct 1 ms 1016 KB Output is correct
5 Correct 2 ms 768 KB Output is correct
6 Correct 1 ms 768 KB Output is correct
7 Correct 413 ms 684 KB Output is correct
8 Correct 568 ms 684 KB Output is correct
9 Correct 491 ms 684 KB Output is correct
10 Correct 368 ms 688 KB Output is correct
11 Incorrect 4 ms 768 KB Wrong query response.
12 Halted 0 ms 0 KB -

Subtask #5
0 / 61.0

# Verdict Execution time Memory Grader output
1 Incorrect 370 ms 1004 KB Wrong query response.
2 Halted 0 ms 0 KB -