Submission #314309

#	Time	Username	Problem	Language	Result	Execution time	Memory
314309		DanerZein	Stations (IOI20_stations)	C++14	10 / 100	1154 ms	1008 KiB

stations

#include "stations.h"
#include <vector>
#include <bits/stdc++.h>
#define MAX 1000000000
using namespace std;
typedef vector<int> vi;
typedef pair<int,int> ii;
vector<int> labels;
vector<vi> G;
int in[1010],out[1010],vis[1010];
int it=0;
void dfs(int u){
  //it++;
  in[u]=it++;
  vis[u]=1;
  for(auto &v:G[u]){
    if(!vis[v]){
      dfs(v);
    }
  }
  // it++;
  out[u]=it++;
}
std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
  labels.assign(n,-1);
  G.clear();
  G.resize(n+1);
  int t=u.size();
  for(int i=0;i<t;i++){
    int x=u[i],y=v[i];
    G[x].push_back(y);
    G[y].push_back(x);
  }
  memset(vis,0,sizeof vis);
  memset(in,0,sizeof in);
  memset(out,0,sizeof out);
  dfs(0);
  for(int i=0;i<n;i++){
    int la=in[i]*10000;
    la+=out[i];
    // cout<<in[i]<<" "<<out[i]<<" "<<la<<endl;
    labels[i]=la;
  }
  return labels;
}

int find_next_station(int s, int t, std::vector<int> c) {
  int ro=-1,rp=-1;
  int si,ti,so,to;
  si=s/10000; so=s%10000;
  ti=t/10000; to=t%10000;
  bool sub=0;
  int ia,oa;
  for(int i=0;i<c.size();i++){
    if(t==c[i]) return c[i];
    ia=c[i]/10000; oa=c[i]%10000;
    if(si<ia && ia<so){ // si s es padre de c[i]
      if(ia<ti && ti<oa){ //  si c[i] es padre de t
	rp=c[i];
      }
    }
    else{
      ro=c[i];
    }
  }
  if(si<ti && ti<so){ // si s es padre de t
    /* if(rp==-1) {cout<<"s es padre de t "<<s<<" "<<t<<endl;
      for(int i=0;i<c.size();i++) cout<<c[i]<<" ";
      cout<<endl;
    }*/
    return rp;
  }
  else{
    /* if(ro==-1) {cout<<"s es hijo de t "<<s<<" "<<t<<endl;
      for(int i=0;i<c.size();i++) cout<<c[i]<<" ";
      cout<<endl;
    }*/
    return ro;
  }
}

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:54:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |   for(int i=0;i<c.size();i++){
      |               ~^~~~~~~~~
stations.cpp:49:16: warning: variable 'to' set but not used [-Wunused-but-set-variable]
   49 |   int si,ti,so,to;
      |                ^~
stations.cpp:52:8: warning: unused variable 'sub' [-Wunused-variable]
   52 |   bool sub=0;
      |        ^~~

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