Submission #1078940

#	Time	Username	Problem	Language	Result	Execution time	Memory
1078940		Trumling	Counting Mushrooms (IOI20_mushrooms)	C++14	0 / 100	5 ms	600 KiB

mushrooms

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

typedef long long ll;
#define pb push_back
#define F first
#define S second
#define enter cout<<'\n';
#define INF 99999999999999999
#define MOD 1000000007
#define all(x) x.begin(),x.end()

int count_mushrooms(int n) {
	vector<int>A,B;
	A.pb(0);
	int i;
	for(i=1;i<min(n,200);i++)
	{
		ll ans=use_machine({0,i});
		
		if(ans)
		{
			if(B.size()!=0)
			B.pb(-1);

			B.pb(i);
			
		}
			
		else
		{
			A.pb(-1);
			A.pb(i);
		}
			
		
		if(A.size()==201 || B.size()==201)
			break;
	}
	ll counta=A.size()/2 + 1;
	i++;
	
	for(i=i;i<n;i+=100)
	{
	if(B.size()<=A.size())
	{
		if(i+100<n)
		{
		for(int j=0;j<100;j++)
			A[j*2+1]=i+j;
		
		ll ans=use_machine(A);
		counta+=100-ans/2;
		continue;

		}
		vector<int>p;
		int j;
		for(j=0;j<n-i;j++)
			{
				p.pb(A[j*2]);
				p.pb(i+j);
			}

		p.pb(A[j*2]);
		ll ans=use_machine(p);
		counta+=(n-i)-ans/2;

	}
	else
	{
		if(i+100<n)
		{
		for(int j=0;j<100;j++)
			B[j*2+1]=i+j;
		
		ll ans=use_machine(B);
		counta+=ans/2;
		continue;
		}

		vector<int>p;
		int j;
		for(j=0;j<n-i;j++)
			{
				p.pb(B[j*2]);
				p.pb(i+j);
			}

		p.pb(B[j*2]);
		ll ans=use_machine(p);
		counta+=ans/2;
	}

	}
	return counta;

}

• Subtask 1: 0 / 100