Submission #602022

#	Time	Username	Problem	Language	Result	Execution time	Memory
602022		FatihSolak	Stations (IOI20_stations)	C++17	76 / 100	935 ms	816 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
#define N 1000
vector<int> adj[N];
int tin[N];
int tout[N];
int dep[N];
int timer = -1;
void dfs(int v,int par){
	tin[v] = ++timer;
	for(auto u:adj[v]){
		if(u == par)continue;
		dep[u] = dep[v]+1;
		dfs(u,v);
	}
	tout[v] = ++timer;
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	timer = 0;
	for(int i = 0;i<n;i++){
		adj[i].clear();
	}
	for(int i = 0;i<n-1;i++){
		adj[u[i]].push_back(v[i]);
		adj[v[i]].push_back(u[i]);
	}
	dfs(0,-1);
	vector<int> labels(n);
	for (int i = 0; i < n; i++) {
		if(dep[i] & 1){
			labels[i] = tin[i];
		}
		else labels[i] = tout[i];
	}
	return labels;
}

int find_next_station(int s, int t, vector<int> c) {
	int sz = c.size();
	sort(c.begin(),c.end());
	for(auto u:c){
		if(u == t)
			return u;
	}
	if(c[0] > s){
		int last = s + 1;
		for(int i = 0;i<sz-1;i++){
			if(last <= t && t <= c[i]){
				return c[i];
			}
			last = c[i] + 1;
		}
		return c[sz-1];
	}
	else{
		reverse(c.begin(),c.end());
		int last = s - 1;
		for(int i = 0;i<sz-1;i++){
			if(c[i] <= t && t <= last){
				return c[i];
			}
			last = c[i] - 1;
		}
		return c[sz-1];
	}
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 50 / 61