Submission #1054728

#	Time	Username	Problem	Language	Result	Execution time	Memory
1054728		LittleOrange	Stations (IOI20_stations)	C++17	5 / 100	521 ms	1016 KiB

stations

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

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
	vector<ll> labels(n);
	iota(labels.begin(),labels.end(),0);
	vector<vector<ll>> con(n);
	for(ll i = 0;i<n-1;i++){
		con[u[i]].push_back(v[i]);
		con[v[i]].push_back(u[i]);
	}
	fill(labels.begin(),labels.end(),-1);
	for(ll i = 0;i<n;i++){
		if (con[i].size()==1&&labels[i]==-1){
			ll cur = i;
			ll it = 0;
			while(cur!=-1){
				labels[cur] = it++;
				ll nxt = -1;
				for(ll j : con[cur]) if (labels[j]==-1) nxt = j;
				cur = nxt;
			}
		}
	}
	return labels;
}

int find_next_station(int s, int t, std::vector<int> c) {
	/*s++;t++;
	ll lgs = __lg(s), lgt = __lg(t);
	if (lgs<lgt){
		ll x = t>>(lgt-lgs);
		if (s==x){
			return (t>>(lgt-lgs-1))-1;
		}
	}
	return (s>>1)-1;*/
	if (t>s) return s+1;
	else return s-1;
}

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