Submission #711784

#	Time	Username	Problem	Language	Result	Execution time	Memory
711784		mseebacher	Counting Mushrooms (IOI20_mushrooms)	C++17	Compilation error	0 ms	0 KiB

mushrooms

#include "mushrooms.h"
#include<bits/stdc++.h>
#define ll long long
using namespace std;

int count_mushrooms(int n){
  vector<int> a(2);
  a[0] = 0;
  a[1] = 1;
  if(n == 1) return 1;
  if(n == 2) return use_machine(a) == 1 ? 1 : 2; 
	
  a.assign(3);
  a[1] = 0;
  int ans = 1;
  for(int i = 1;i<n-1;i+=2){
	a[0] = i;
	a[2] = i+1;
	int x = use_machine(a);
	if(x == 0) ans+=2;
	if(x == 1) ans++;
  }
  return ans;
}

Compilation message (stderr)

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:13:13: error: no matching function for call to 'std::vector<int>::assign(int)'
   13 |   a.assign(3);
      |             ^
In file included from /usr/include/c++/10/vector:67,
                 from mushrooms.h:1,
                 from mushrooms.cpp:1:
/usr/include/c++/10/bits/stl_vector.h:749:7: note: candidate: 'void std::vector<_Tp, _Alloc>::assign(std::vector<_Tp, _Alloc>::size_type, const value_type&) [with _Tp = int; _Alloc = std::allocator<int>; std::vector<_Tp, _Alloc>::size_type = long unsigned int; std::vector<_Tp, _Alloc>::value_type = int]'
  749 |       assign(size_type __n, const value_type& __val)
      |       ^~~~~~
/usr/include/c++/10/bits/stl_vector.h:749:7: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/10/bits/stl_vector.h:768:2: note: candidate: 'template<class _InputIterator, class> void std::vector<_Tp, _Alloc>::assign(_InputIterator, _InputIterator) [with _InputIterator = _InputIterator; <template-parameter-2-2> = <template-parameter-1-2>; _Tp = int; _Alloc = std::allocator<int>]'
  768 |  assign(_InputIterator __first, _InputIterator __last)
      |  ^~~~~~
/usr/include/c++/10/bits/stl_vector.h:768:2: note:   template argument deduction/substitution failed:
mushrooms.cpp:13:13: note:   candidate expects 2 arguments, 1 provided
   13 |   a.assign(3);
      |             ^
In file included from /usr/include/c++/10/vector:67,
                 from mushrooms.h:1,
                 from mushrooms.cpp:1:
/usr/include/c++/10/bits/stl_vector.h:794:7: note: candidate: 'void std::vector<_Tp, _Alloc>::assign(std::initializer_list<_Tp>) [with _Tp = int; _Alloc = std::allocator<int>]'
  794 |       assign(initializer_list<value_type> __l)
      |       ^~~~~~
/usr/include/c++/10/bits/stl_vector.h:794:43: note:   no known conversion for argument 1 from 'int' to 'std::initializer_list<int>'
  794 |       assign(initializer_list<value_type> __l)
      |              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~