Submission #652972

#	Time	Username	Problem	Language	Result	Execution time	Memory
652972		mychecksedad	Stations (IOI20_stations)	C++17	0 / 100	1006 ms	47484 KiB

stations

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
const int N = 1e6;

vector<int> g[N];
int timer = 0, tin[N], tout[N];
void dfs(int v, int p){
	tin[v] = timer++;
	for(int u: g[v]){
		if(u != p) dfs(u, v);
	}
	tout[v] = timer;
}

vector<int> label(int n, int k, vector<int> u, vector<int> v){
	dfs(1, 1);
	vector<int> l;
	for(int i = 0; i < n; ++i) l.pb(tin[i] * 1000 + tout[i]);
	return l;
}
int find_next_station(int s, int t, vector<int> c){
	for(int p: c){
		if(p==t) return t;
	}

	int ti = t, to = t % 1000;

	int sx = s, sy = s % 1000;

	int par = -1;
	for(int v: c){
		int x = v, y = v % 1000;
		if(x <= sx && sy <= y){
			par = v;
		}
		else if(x <= ti && to <= y){
			return v;
		}
	}
	return par;
}

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