Submission #430715

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
430715	2021-06-17T02:24:34 Z	JUANDI321	Stations (IOI20_stations)	C++17	Compilation error	0 ms	0 KB

stations

#include "stations.h"
#include <vector>
#include <iostream>

using namespace std;
vector<vector<int>> g(1000+10);
vector<int> l(1000 +10);
bool ch[1010];

void dfs(int node, int& i)
{
  if(ch[node])return;
  ch[node]=true;
  l[i] = node;
  //cout<<node<<endl;
  for(auto y : g[node])
  {
    if(!ch[y])
    {
      dfs(y, i+1);
    }
  }
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
  vector<int> labels(n);
  
  for(int i = 0; i < n-1; i++)
  {
    g[u[i]].push_back(v[i]);
    g[v[i]].push_back(u[i]);
  }
  int spn = 0;
  for(int i = 0; i < n; i++)
  {
    if(g[i].size() == 1)
    {
      spn = i;
      break;
    }
  }
  
  int pos = 0;

  dfs(spn, pos);//cout<<"hola"<<endl;
  for (int i = 0; i < n; i++) {
    labels[l[i]] = i;
    //cout<<"l[i] "<<l[i]<<" i "<<i<<endl;
  }
  return labels;
}

int find_next_station(int s, int t, vector<int> c) 
{
  if(t>s)return s+1;
  return s-1;
}

Compilation message

stations.cpp: In function 'void dfs(int, int&)':
stations.cpp:20:15: error: cannot bind non-const lvalue reference of type 'int&' to an rvalue of type 'int'
   20 |       dfs(y, i+1);
      |              ~^~
stations.cpp:10:25: note:   initializing argument 2 of 'void dfs(int, int&)'
   10 | void dfs(int node, int& i)
      |                    ~~~~~^