Submission #430441

#	Time	Username	Problem	Language	Result	Execution time	Memory
430441		DanerZein	Stations (IOI20_stations)	C++14	27.55 / 100	1470 ms	736 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
typedef vector<int> vi;
const int MAX_N=1010;
vector<vi> G;
int in[MAX_N],out[MAX_N];
int it;
void dfs(int u,int p){
  in[u]=out[u]=it; it++;
  for(auto &v:G[u]){
    if(v!=p){
      dfs(v,u);
      out[u]=max(out[v],out[u]);
    }
  }
}
std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
  G.clear();  G.resize(n+1);
  memset(in,0,sizeof in); memset(out,0,sizeof out);
  it=0;
  for(int i=0;i<n-1;i++){
    G[u[i]].push_back(v[i]);
    G[v[i]].push_back(u[i]);
  }
  dfs(0,-1);
  vector<int> lab;
  for(int i=0;i<n;i++){
    lab.push_back(out[i]*10000+in[i]);
  }
  return lab;
}

int find_next_station(int s, int t, std::vector<int> c) {
  int pa=-1,hj=-1;
  int lt,rt;
  lt=t%10000;
  rt=t/10000;
  int ls,rs;
  ls=s%10000;
  rs=s/10000;
  for(auto &v:c){
    int l,r;
    l=v%10000;
    r=v/10000;
    if(l<=ls && rs<=r){
      pa=v;
      continue;
    }
    if(l<=lt && rt<=r) hj=v;
  }
  //cout<<s<<" "<<t<<" "<<hj<<" "<<pa<<endl;
  if(hj==-1) return pa;
  return hj;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 0 / 16
• Subtask 4: 10 / 10
• Subtask 5: 17.5505 / 61