Submission #1019104

#	Time	Username	Problem	Language	Result	Execution time	Memory
1019104		j_vdd16	Counting Mushrooms (IOI20_mushrooms)	C++17	Compilation error	0 ms	0 KiB

mushrooms

#include <algorithm>
#include <bitset>
#include <cstdint>
#include <cstring>
#include <iostream>
#include <limits.h>
#include <math.h>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <vector>
 
//#define int long long
#define loop(X, N) for(int X = 0; X < (N); X++)
#define all(V) V.begin(), V.end()
#define rall(V) V.rbegin(), V.rend()
 
using namespace std;
 
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int, int> ii;
typedef vector<ii> vii;
typedef vector<vector<ii>> vvii;
typedef vector<bool> vb;
typedef vector<vector<bool>> vvb;
 
//int use_machine(vi x);
 
int count_mushrooms(int n)
{
	vi a = { 0 };
	vi b;
 
	int i = 1;
	/*for (; i < n; i++)
	{
		int res = use_machine({ 0, i });
		if (res == 0)
			a.push_back(i);
		else
			b.push_back(i);
 
		if (a.size() >= 2 && 2 * a.size() * a.size() >= n)
			break;
 
		if (b.size() >= 2 && 2 * b.size() * b.size() >= n)
			break;
	}
	i++;*/
 
	int result = a.size();
	while (i < n)
	{
		if (a.size() > b.size())
		{
			int sq = a.size();
			
			vi ask;
			int asked = min(sq, n - i);
			loop(j, asked)
			{
				ask.push_back(a[j]);
				ask.push_back(i++);
			}
 
			int res = use_machine(ask);
			result += asked - res / 2 - res % 2;
			if (res % 2)
				b.push_back(i - 1);
			else
				a.push_back(i - 1);
 
			if (asked == 2)
			{
				if (res >= 2)
					b.push_back(i - 2);
				else
					a.push_back(i - 2);
			}
		}
		else
		{
			int sq = b.size();
			
			vi ask;
			int asked = min(sq, n - i);
			loop(j, asked)
			{
				ask.push_back(b[j]);
				ask.push_back(i++);
			}
 
			int res = use_machine(ask);
			result += res / 2 + res % 2;
			if (res % 2)
				a.push_back(i - 1);
			else
				b.push_back(i - 1);
 
			if (asked == 2)
			{
				if (res >= 2)
					a.push_back(i - 2);
				else
					b.push_back(i - 2);
			}
		}
	}
 
	return result;
}

Compilation message (stderr)

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:70:14: error: 'use_machine' was not declared in this scope
   70 |    int res = use_machine(ask);
      |              ^~~~~~~~~~~
mushrooms.cpp:97:14: error: 'use_machine' was not declared in this scope
   97 |    int res = use_machine(ask);
      |              ^~~~~~~~~~~