제출 #1292696

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1292696		ChuanChen	기지국 (IOI20_stations)	C++20	10 / 100	398 ms	540 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;

typedef unsigned short int usi;

const int MAXN = 1e3+3;

vector<usi> adj[MAXN];
usi tin[MAXN], tout[MAXN], tempo;
void dfs(int no, int anc){
	assert(tempo < 1000);
	tin[no] = tempo++;
	for(int v : adj[no]) if(v != anc){
		dfs(v, no);
	}
	tout[no] = tempo;
}


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

	for (int i = 0; i < n-1; i++){
		adj[u[i]].push_back(v[i]);
		adj[v[i]].push_back(u[i]);
	}
	dfs(0, 0);
	vector<int> labels(n);
	for (int i = 0; i < n; i++) {
		labels[i] = tin[i]*1000+tout[i];
	}
	return labels;
}

inline int _tin(int a){
	return a/1000;
}
inline int _tout(int a){
	return a%1000;
}

int find_next_station(int s, int t, vector<int> c) {
	if(_tin(s) <= _tin(t) && _tout(t) <= _tout(s)){ //t eh  filho
		for(int l : c){
			if(_tin(l) <= _tin(s) && _tout(s) <= _tout(l)) continue;
			if(_tin(l) <= _tin(t) && _tout(t) <= _tout(l)){ //t eh meu filho
				return l;
			}
		}
	}

	for(int l : c){
		if(_tin(l) <= _tin(s) && _tout(s) <= _tout(l)) return l;
	}
	return c[0];
}

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