Submission #719362

#	Time	Username	Problem	Language	Result	Execution time	Memory
719362		mseebacher	Stations (IOI20_stations)	C++17	16 / 100	875 ms	660 KiB

stations

#include "stations.h"
#include <bits/stdc++.h> 

using namespace std;

#define MAXI (int)1e3+10

vector<int> ad[MAXI];
vector<int> labels;


// 1 .. 1e3
// 1e3+1 ... 2e3
void dfs(int x,int e){
	for(auto s: ad[x]){
		if(s == e) continue;
		labels[s] = labels[x]+1e3;
		dfs(s,x);
	}
}


vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	labels.assign(n,0);
	for(int i = 0;i<MAXI;i++) ad[i].clear();
	
	for(int i = 0;i<n-1;i++){
		ad[u[i]].push_back(v[i]);
		ad[v[i]].push_back(u[i]);
	}
	int start = 0;
	for(int i = 0;i<n;i++){
		if(ad[i].size() >= 3){
			start = i;
			break;
		}
	}
	int cnt = 1;
	labels[start] = 0;
	for(auto s: ad[start]){
		labels[s] = cnt++;
		dfs(s,start);
	}
	return labels;
}

int find_next_station(int s, int t, std::vector<int> c) {
	if(s%1000 != t%1000){
		if(s == 0) return t%1000;
		return s > 999 ? s-1e3 : 0;
	}
	return s > t ? s-1e3 : s+1e3;
}

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