Submission #828672

#	Time	Username	Problem	Language	Result	Execution time	Memory
828672		Minindu206	Counting Mushrooms (IOI20_mushrooms)	C++14	0 / 100	2 ms	208 KiB

mushrooms

#include "mushrooms.h"
#include <bits/stdc++.h>
using namespace std;
int count_mushrooms(int n)
{
	vector<int> posa, posb, pos;
	int acnt = 1, bcnt = 0, cnt, ans = 0;
	posa.push_back(0);
	for (int i = 1; i < min(200, n); i++)
	{
		int cur = use_machine({0, i});
		if (cur == 0)
		{
			if (acnt < 97)
				posa.push_back(i);
			acnt++;
		}
		else
		{
			if (bcnt < 97)
				posb.push_back(i);
			bcnt++;
			ans++;
		}
	}
	if (n <= 200)
	{
		return n - ans;
	}
	if (acnt >= bcnt)
		pos = posa;
	else
		pos = posb;

	int i = 200;

	vector<int> chk;
	while (i < n)
	{
		chk.clear();
		int cur = 0, vr = i + cnt;
		for(;i<vr && cur < pos.size();i++)
		{
			chk.push_back(i);
			chk.push_back(pos[cur]);
			cur++;
		}
		int ncur = use_machine(chk);
		if (acnt >= bcnt)
			ans += (ncur + 1) / 2;
		else
			ans += (cur - ((ncur + 1) / 2));
	}
	return n - ans;
}

Compilation message (stderr)

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:42:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |   for(;i<vr && cur < pos.size();i++)
      |                ~~~~^~~~~~~~~~~~
mushrooms.cpp:41:16: warning: 'cnt' may be used uninitialized in this function [-Wmaybe-uninitialized]
   41 |   int cur = 0, vr = i + cnt;
      |                ^~

• Subtask 1: 0 / 100