Submission #429886

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
429886	2021-06-16T10:16:03 Z	dreezy	Stations (IOI20_stations)	C++17	Compilation error	0 ms	0 KB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pb push_back

vector<int> labels;
vector<vector<int>> graph;

void dfs(int n,int p,  int curlabel){
	labels[n] = curlabel;
	for(int adj : graph[n])
	{
		if(adj != p)
			dfs(adj, n, curlabel + 1);
	}
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	vector<int> cnt(n);
	labels.assign(n, 0);
	graph.assign( n, vector<int>());
	for (int i = 0; i < n - 1; i++) {
		//cout << u[i]<<", "<<v[i]<<endl;
		cnt[u[i]]++;
		cnt[v[i]]++;
		graph[u[i]].pb(v[i]);
		graph[v[i]].pb(u[i]);
	}
	
	int root = 0;
	for(int i=0; i<n; i++)
		if(cnt[i] >2){
			root = i;
			break;
		}
		
	graph[root] = 0;
	int counter = 0;
	for(int branch : graph[root]){
		dfs(branch, root,counter * 1000 +1);
		counter++;
	}
	
	
	return labels;
}

int find_next_station(int s, int t, vector<int> c) {
	int startbranch = s/1000;
	int endbranch = t/1000;
	if(s == 0){
		return endbranch * 1000 + 1;
	}
	
	if(startbranch == endbranch){
		if(s < t)
			return s + 1;
		
			
	}
	
	if( (s - 1) % 1000 == 0)
			return 0;
		return s -1;
}


/************/

Compilation message

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:38:16: error: no match for 'operator=' (operand types are '__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> >, std::vector<int> >::value_type' {aka 'std::vector<int>'} and 'int')
   38 |  graph[root] = 0;
      |                ^
In file included from /usr/include/c++/10/vector:72,
                 from stations.h:1,
                 from stations.cpp:1:
/usr/include/c++/10/bits/vector.tcc:198:5: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(const std::vector<_Tp, _Alloc>&) [with _Tp = int; _Alloc = std::allocator<int>]'
  198 |     vector<_Tp, _Alloc>::
      |     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/bits/vector.tcc:199:42: note:   no known conversion for argument 1 from 'int' to 'const std::vector<int>&'
  199 |     operator=(const vector<_Tp, _Alloc>& __x)
      |               ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/10/vector:67,
                 from stations.h:1,
                 from stations.cpp:1:
/usr/include/c++/10/bits/stl_vector.h:709:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::vector<_Tp, _Alloc>&&) [with _Tp = int; _Alloc = std::allocator<int>]'
  709 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |       ^~~~~~~~
/usr/include/c++/10/bits/stl_vector.h:709:26: note:   no known conversion for argument 1 from 'int' to 'std::vector<int>&&'
  709 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |                 ~~~~~~~~~^~~
/usr/include/c++/10/bits/stl_vector.h:730:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::initializer_list<_Tp>) [with _Tp = int; _Alloc = std::allocator<int>]'
  730 |       operator=(initializer_list<value_type> __l)
      |       ^~~~~~~~
/usr/include/c++/10/bits/stl_vector.h:730:46: note:   no known conversion for argument 1 from 'int' to 'std::initializer_list<int>'
  730 |       operator=(initializer_list<value_type> __l)
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~