Submission #1311970

#	Time	Username	Problem	Language	Result	Execution time	Memory
1311970		aaaaaaaa	Stations (IOI20_stations)	C++20	0 / 100	394 ms	552 KiB

stations

#include <bits/stdc++.h>
#include "stations.h"

using namespace std;

const int MAXN = 100005;

vector<int> adj[MAXN];
int tin[MAXN], tout[MAXN];
int timer;


void dfs_label(int u, int p) {
    tin[u] = timer++;
    for (int v : adj[u]) {
        if (v == p) continue;
        dfs_label(v, u);
    }
    tout[u] = timer - 1;
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
    for (int i = 0; i < n; i++) adj[i].clear();
    timer = 0;

    for (int i = 0; i < (int)u.size(); i++) {
        adj[u[i]].push_back(v[i]);
        adj[v[i]].push_back(u[i]);
    }

    dfs_label(0, -1);  
    vector<int> labels(n);
    for (int i = 0; i < n; i++) {
        labels[i] = tin[i];  
    }
    return labels;
}

int find_next_station(int s, int t, vector<int> c) {
    for (int v : c) {
        if (tin[v] <= tin[t] && tin[t] <= tout[v]) {
            return v;
        }
    }
    return -1; 
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 0 / 16
• Subtask 4: 0 / 10
• Subtask 5: 0 / 61