Submission #499859

#	Time	Username	Problem	Language	Result	Execution time	Memory
499859		Hanksburger	Counting Mushrooms (IOI20_mushrooms)	C++17	56.93 / 100	10 ms	328 KiB

mushrooms

#include "mushrooms.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> A, B, tmp;
int count_mushrooms(int N)
{
	int num=sqrt(2*N), ans;
	A.push_back(0);
	for (int i=1; i<num; i++)
	{
		tmp.clear();
		tmp.push_back(0);
		tmp.push_back(i);
		if (use_machine(tmp))
			B.push_back(i);
		else
			A.push_back(i);
	}
	ans=A.size();
	if (A.size()>=B.size())
	{
		int sz=A.size();
		for (int l=num, r=num+sz-1; l<N; l+=sz, r+=sz)
		{
			r=min(r, N-1);
			tmp.clear();
			for (int i=l; i<=r; i++)
			{
				tmp.push_back(A[i-l]);
				tmp.push_back(i);
			}
			ans+=r-l+1-(use_machine(tmp)+1)/2;
		}
	}
	else
	{
		int sz=B.size();
		for (int l=num, r=num+sz-1; l<N; l+=sz, r+=sz)
		{
			r=min(r, N-1);
			tmp.clear();
			for (int i=l; i<=r; i++)
			{
				tmp.push_back(B[i-l]);
				tmp.push_back(i);
			}
			ans+=(use_machine(tmp)+1)/2;
		}
	}
	return ans;
}

• Subtask 1: 56.927 / 100