Submission #429443

#	Time	Username	Problem	Language	Result	Execution time	Memory
429443		DanerZein	Stations (IOI20_stations)	C++14	0 / 100	1178 ms	3100 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
typedef vector<int> vi;
vector<vi> G;
vector<vi> li;
void dfs(int u,int p){
  for(auto &v:G[u]){
    if(v!=p){
      dfs(v,u);
      for(int i=0;i<li[v].size();i++){
	li[u].push_back(li[v][i]);
      }
    }
  }
  li[u].push_back(u);
}
int construct(int id){
  int s=0;
  int e=1;
  for(int i=li[id].size()-1;i>=0;i--){
    s+=(li[id][i]*e);
    e*=10;
  }
  return s;
}
std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
  G.clear(); li.clear();
  G.resize(n+1);
  li.resize(n+1);
  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(construct(i));
    //cout<<lab[i]<<" ";
  }
  //cout<<endl;
  return lab;
}

int find_next_station(int s, int t, std::vector<int> c) {
  int pa=-1;
  int hj=-1;
  for(auto &v:c){
    if(v>s){
      pa=v;
      continue;
    }
    int aux=v/10;
    vector<int> hijo;
    while(aux!=0){
      hijo.push_back(aux%10);
      aux/=10;
    }
    reverse(hijo.begin(),hijo.end());
    for(int i=0;i<hijo.size();i++){
      int s=0;
      for(int j=i;j<hijo.size();j++){
	s*=10;
	s+=hijo[j];
	if(s==t){
	  hj=v;
	  break;
	}
      }
      if(hj!=-1) break;
    }
  }
  if(hj==-1) return pa;
  return hj;
}

Compilation message (stderr)

stations.cpp: In function 'void dfs(int, int)':
stations.cpp:11:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |       for(int i=0;i<li[v].size();i++){
      |                   ~^~~~~~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:60:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |     for(int i=0;i<hijo.size();i++){
      |                 ~^~~~~~~~~~~~
stations.cpp:62:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |       for(int j=i;j<hijo.size();j++){
      |                   ~^~~~~~~~~~~~

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