Submission #652986

#	Time	Username	Problem	Language	Result	Execution time	Memory
652986		mychecksedad	Stations (IOI20_stations)	C++17	52.32 / 100	947 ms	840 KiB

stations

#include <bits/stdc++.h>
using namespace std;
#define pb push_back


vector<int> label(int n, int k, vector<int> u, vector<int> v){
	int timer = 0, tin[n], tout[n];
	vector<vector<int>> g(n);
	for(int i = 0; i < n-1; ++i) g[u[i]].pb(v[i]), g[v[i]].pb(u[i]);
	function<void(int, int)> dfs = [&](int v, int p){
		tin[v] = timer;
		for(int u: g[v]){
			if(u != p) dfs(u, v);
		}
		tout[v] = timer++;
	};

	dfs(0, 0);
	vector<int> l;
	for(int i = 0; i < n; ++i) l.pb(tin[i] + tout[i] * 1000);
	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 % 1000, to = t;

	int sx = s % 1000, sy = s;

	int par = -1;
	for(int v: c){
		int x = v % 1000, y = v;
		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: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 26.3244 / 61