Submission #346053

#	Time	Username	Problem	Language	Result	Execution time	Memory
346053		athensclub	Counting Mushrooms (IOI20_mushrooms)	C++14	Compilation error	0 ms	0 KiB

mushrooms

int div2RoundUp(int x)
{
	int d = x / 2;
	if (d * 2 < x)
		return d + 1;
	return d;
}

int count_mushrooms(int n)
{
	std::vector<int> m;
	for (int i = 0; i < n; i++)
		m.push_back(i);
	int c1 = use_machine(m);
	m = {0, 1};
	int c2 = use_machine(m);
	return c2 == 1 ? div2RoundUp(c1) : n - div2RoundUp(c1);
}

Compilation message (stderr)

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:13:7: error: 'vector' is not a member of 'std'
   13 |  std::vector<int> m;
      |       ^~~~~~
mushrooms.cpp:1:1: note: 'std::vector' is defined in header '<vector>'; did you forget to '#include <vector>'?
  +++ |+#include <vector>
    1 | 
mushrooms.cpp:13:14: error: expected primary-expression before 'int'
   13 |  std::vector<int> m;
      |              ^~~
mushrooms.cpp:15:3: error: 'm' was not declared in this scope
   15 |   m.push_back(i);
      |   ^
mushrooms.cpp:16:23: error: 'm' was not declared in this scope
   16 |  int c1 = use_machine(m);
      |                       ^
mushrooms.cpp:16:11: error: 'use_machine' was not declared in this scope
   16 |  int c1 = use_machine(m);
      |           ^~~~~~~~~~~