Submission #885267

#	Time	Username	Problem	Language	Result	Execution time	Memory
885267		epicci23	Stations (IOI20_stations)	C++17	36.31 / 100	552 ms	1720 KiB

stations

#include "stations.h"
#include "bits/stdc++.h"
using namespace std;
#define pb push_back
typedef long long ll;

vector<int> v[1005];
int ti=0,ttin[1005],ttout[1005];

void dfs(int c,int p){
  ttin[c]=++ti;
  for(int x:v[c]){
    if(x==p) continue;
    dfs(x,c);
  }
  ttout[c]=ti;
}
	

vector<int> label(int n,int k,vector<int> u,vector<int> w){
  ti=0;
  for(int i=0;i<n;i++) v[i].clear();  

  vector<int> res(n);

  for(int i=0;i<u.size();i++){
    v[u[i]].pb(w[i]);
    v[w[i]].pb(u[i]);
  }

  dfs(0,-1);
  
  for(int i=0;i<n;i++) res[i]=1001*ttin[i]+ttout[i];
  return res;
}

int find_next_station(int s,int t,vector<int> c) {
  int sin,sout,tin,tout;
  sout=s%1001;
  sin=s/1001;
  tout=t%1001;
  tin=t/1001;
  
  if(sin<=tin && tout<=sout){
	for(int x:c){
	  int xin,xout;
	  xout=x%1001;
	  xin=x/1001;
	  if(xin>sin && xin<=tin && tout<=xout) return x;
	}
  }

  return c[0];
}

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:26:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |   for(int i=0;i<u.size();i++){
      |               ~^~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 0 / 16
• Subtask 4: 10 / 10
• Subtask 5: 26.3129 / 61