Submission #427284

#	Time	Username	Problem	Language	Result	Execution time	Memory
427284		AugustinasJucas	Stations (IOI20_stations)	C++14	0 / 100	3052 ms	2097156 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
const int dydis = 1000;
vector<int> gr[dydis];
int enter[dydis];
int leave[dydis];
vector<int> ret (dydis);
int dbInd = 0;
void dfs(int v, int came){
	enter[v] = dbInd++;
	for(auto x : gr[v]){
		if(x == came) continue;
		dfs(x, v);
	}
	leave[v] = dbInd;
	ret[v] = enter[v] * dydis + leave[v] - 1;
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	for(int i = 0; i < n-1; i++){
		gr[u[i]].push_back(v[i]);
		gr[v[i]].push_back(u[i]);
	}
	dfs(0, -1);
	ret.resize(n);
	
	return ret;
}

int find_next_station(int s, int t, vector<int> c) {
	int enterS = s / 1000;
	int leaveS = s % 1000;
	int enterT = t / 1000;
	int leaveT = t % 1000;
	if(enterS <= enterT && leaveT <= leaveS){
		for(auto x : c){
			int e = x / 1000;
			int l = x % 1000;
			if(e <= enterT && leaveT <= l){
				return x;
			}
		}
	}else{ // eisiu aukstyn
		for(auto x : c){
			int e = x / 1000;
			int l = x % 1000;
			if(e <= enterS && leaveS <= l){
				return x;
			}
		}
	}
	return -1;
}

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