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Submission #306152

# Submission time Handle Problem Language Result Execution time Memory
306152 2020-09-24T16:51:52 Z SorahISA Stations (IOI20_stations) C++17
0 / 100
 894 ms 1048 KB 
#include "stations.h"
#include <bits/stdc++.h>
using namespace std;

using pii = pair<int, int>;
template<typename T>
using Prior = priority_queue<T>;
template<typename T>
using prior = priority_queue<T, vector<T>, greater<T>>;

#define X first
#define Y second
#define ALL(x) (x).begin(), (x).end()
#define eb emplace_back
#define pb push_back

const int maxn = 1000 + 5;

vector<int> adj[maxn], lab, sz;
int tok = 0;

void dfs(int now, int lst) {
    lab[now] = tok++, sz[now] = 1;
    for (auto x : adj[now]) {
        if (x != lst) dfs(x, now), sz[now] += sz[x];
    }
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
    for (int i = 0; i < maxn; ++i) adj[i].clear();
    lab.resize(n), sz.resize(n);
    tok = 0;
    
    for (int i = 0; i < n-1; ++i) {
        adj[u[i]].eb(v[i]), adj[v[i]].eb(u[i]);
    }
    dfs(0, -1);
    
    for (int i = 0; i < n; ++i) lab[i] = lab[i] * 1000 + sz[i] - 1;
    
    // cout << "lab : ";
    // for (int i = 0; i < n; ++i) cout << lab[i] << " \n"[i == n-1];
    
    return lab;
}

int find_next_station(int s, int t, vector<int> c) {
    // sort(ALL(c), [](auto a, auto b) {return a/1000 < b/1000;});
    // cout << "c : "; for (auto x : c) cout << x << " "; cout << "\n";
    if (s/1000 > t/1000 or s/1000 + s%1000 <= t/1000) return c[0];
    for (int i = 1; i < c.size(); ++i) {
        if (c[i]/1000 > t/1000) return c[i - 1];
    }
    return c.back();
}

Compilation message

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:51:23: 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 = 1; i < c.size(); ++i) {
      |                     ~~^~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 512 KB Invalid labels (values out of range). scenario=0, k=1000, vertex=1, label=6003
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 384 KB Invalid labels (values out of range). scenario=0, k=1000, vertex=1, label=1510
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 578 ms 1024 KB Wrong query response.
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 894 ms 1048 KB Output is correct
2 Incorrect 715 ms 880 KB Wrong query response.
3 Halted 0 ms 0 KB -

Subtask #5
0 / 61.0

# Verdict Execution time Memory Grader output
1 Incorrect 538 ms 1024 KB Wrong query response.
2 Halted 0 ms 0 KB -