Submission #306099

#	Time	Username	Problem	Language	Result	Execution time	Memory
306099		SorahISA	Stations (IOI20_stations)	C++17	5 / 100	1148 ms	1048 KiB

stations

#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;

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

void dfs(int now, int lst) {
    // cout << lab[now] << " ";
    for (auto x : adj[now]) {
        if (x != lst) lab[x] = lab[now] + 1, lstvis = x, dfs(x, now);
    }
}

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);
    
    for (int i = 0; i < n-1; ++i) {
        adj[u[i]].eb(v[i]), adj[v[i]].eb(u[i]);
    }
    dfs(0, -1), lab[lstvis] = 0, dfs(lstvis, -1);
    
	return lab;
}

int find_next_station(int s, int t, vector<int> c) {
    return s > t ? c.front() : c.back();
}

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