Submission #609702

#	Time	Username	Problem	Language	Result	Execution time	Memory
609702		daria	Stations (IOI20_stations)	C++14	0 / 100	3 ms	456 KiB

stations

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

const int N = 1000;

int T = 0;
vector<int> adj[N], lb(N, -1);

void dfs(int s){
 if(lb[s]==-1) return;
 lb[s] = T++;
 for(auto u : adj[s]) dfs(u);
 lb[s] += N*T;
}

vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
 for(int i=0; i<n-1; ++i){
  adj[u[i]].push_back(v[i]);
  adj[v[i]].push_back(u[i]);
 }
 dfs(0);
 lb.resize(n);
 return lb;
}

int find_next_station(int s, int t, std::vector<int> c) {
 int x1 = s%(2*N); int  y1 = s/(2*N);
 int x2 = t%(2*N); int  y2 = t/(2*N);
 //tempi di entrata e uscita dei target
 for(auto u : c){
  int x3 = u%(2*N); int y3 = u/(2*N);
  if(x3 <= x2 && y2 <= y3) return u;
 }
 if(x1 >= y2 || y1 <= x2){
  for(auto u : c){
   int x3 = u%(2*N); int y3 = u/(2*N);
   if(x3 < x1 && y1 < y3) return u;
  }
 }
 return c[0];
}

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