Submission #1035218

#	Time	Username	Problem	Language	Result	Execution time	Memory
1035218		Gray	Stations (IOI20_stations)	C++17	5 / 100	696 ms	940 KiB

stations

#include "stations.h"
#include <vector>

#define ll int
#define ff first
#define ss second
#define ln "\n"
#define pll pair<ll, ll>

using namespace std;


vector<vector<ll>> A;

void dfs(ll u, ll p, vector<ll> &labels, ll &timer){
	labels[u]=timer++;
	for (auto v:A[u]){
		if (v==p) continue;
		dfs(v, u, labels, timer);
	}
}

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
	A.clear();
	A.resize(n);
	for (ll i=0; i<n-1; i++){
		A[u[i]].push_back(v[i]);
		A[v[i]].push_back(u[i]);
	}
	vector<int> labels(n);
	for (ll i=0; i<n; i++){
		if (A[i].size()==1){
			ll time=0;
			dfs(i, i, labels, time); break;
		}
	}
	return labels;
}

int find_next_station(int s, int t, std::vector<int> c) {
	ll n = (int)c.size();
	ll ret=0;
	if (s>t){
		for (ll i=n-1; i>=0; i--){
			if (c[i]>=t) ret=c[i];
			else break;
		}
	}else{
		for (ll i=0; i<n; i++){
			if (c[i]<=t) ret=c[i];
			else break;
		}
	}
	return ret;
}

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