oj.uz

Submission #306750

# Submission time Handle Problem Language Result Execution time Memory
306750 2020-09-26T08:40:03 Z VEGAnn Stations (IOI20_stations) C++14
0 / 100
 3000 ms 2097156 KB 
#include "stations.h"
#include <bits/stdc++.h>
#define PB push_back
#define sz(x) ((int)x.size())
using namespace std;
const int N = 1000;
vector<int> g[N];
int tin[N], tout[N], tt = 0;

void dfs(int v, int p){
    tin[v] = tt++;

    for (int u : g[v]){
        if (u == p) continue;
        dfs(u, v);
    }

    tout[v] = tt - 1;
}

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
    for (int i = 0; i < sz(u); i++){
        g[u[i]].PB(v[i]);
        g[v[i]].PB(u[i]);
    }

    dfs(0, -1);

    vector<int> labels;

    labels.resize(n);

    for (int i = 0; i < n; i++) {
        labels[i] = tin[i] * N + tout[i];
//        cerr << labels[i] << '\n';
    }

	return labels;
}

int find_next_station(int s, int t, std::vector<int> c) {
    int tin_s = s / N;
    int tout_s = s % N;

    int tin_t = t / N;
    int tout_t = t % N;

    if (tin_s <= tin_t && tout_s >= tout_t){
        for (int v : c) {
            int tin_v = v / N;
            int tout_v = v % N;

            if (tin_v > tin_s && tin_v <= tin_t && tout_v >= tout_v)
                return v;
        }
    } else {
        for (int v : c)
            if (v / N < tin_s)
                return v;
    }
}

Compilation message

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:53:59: warning: self-comparison always evaluates to true [-Wtautological-compare]
   53 |             if (tin_v > tin_s && tin_v <= tin_t && tout_v >= tout_v)
      |                                                    ~~~~~~ ^~ ~~~~~~
stations.cpp:61:1: warning: control reaches end of non-void function [-Wreturn-type]
   61 | }
      | ^

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 1594 ms 2097156 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3056 ms 624 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Runtime error 1740 ms 2097156 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 884 ms 784 KB Output is correct
2 Runtime error 1311 ms 2097156 KB Execution killed with signal 9 (could be triggered by violating memory limits)
3 Halted 0 ms 0 KB -

Subtask #5
0 / 61.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3036 ms 2097152 KB Time limit exceeded
2 Halted 0 ms 0 KB -