Submission #510337

#	Time	Username	Problem	Language	Result	Execution time	Memory
510337		jamezzz	Stations (IOI20_stations)	C++17	0 / 100	1212 ms	548 KiB

stations

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

vector<int> label(int n,int k,vector<int> u,vector<int> v){
	vector<int> l(n);
	for(int i=0;i<n;++i)l[i]=i;
	return l;
}

int pre[1005],pst[1005],cnt;

void dfs(int u){
	if(u>1000)return;
	pre[u-1]=cnt++;
	dfs(2*u);dfs(2*u+1);
	pst[u-1]=cnt-1;
}

int find_next_station(int s,int t,vector<int> c){
	++s;++t;
	if(cnt==0)dfs(1);
	if(2*s>1000)return c[0];
	if(pre[2*s]<=pre[t]&&pst[t]<=pre[2*s])return 2*s-1;
	if(pre[2*s+1]<=pre[t]&&pst[t]<=pre[2*s+1])return 2*s;
	return s/2-1;
}

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