Submission #306625

#	Time	Username	Problem	Language	Result	Execution time	Memory
306625		daniel920712	Counting Mushrooms (IOI20_mushrooms)	C++14	0 / 100	2 ms	256 KiB

mushrooms

#include "mushrooms.h"
#include <vector>
#include <math.h>
using namespace std;
vector < int > A,B;
vector < int > temp;
int count_mushrooms(int N)
{
    int k=floor(sqrt(2*N)),ans=0,x=0,y=0,i,now,tt;
    for(i=1;i<=min(k,N-1);i++)
    {
        temp.clear();
        temp.push_back(0);
        temp.push_back(i);
        if(use_machine(temp))
        {
            x++;
            B.push_back(i);
        }
        else
        {
            y++;
            A.push_back(i);
        }
    }
    if(x>=y)
    {
        now=k+1;
        while(now<N)
        {
            temp.clear();
            for(auto i:B)
            {
                temp.push_back(i);
                if(now<N)
                {
                    temp.push_back(now);
                    now++;
                }
            }
            tt=use_machine(temp);
            if(temp.size()>=2) ans+=(tt+1)/2;
            //if(tt%2==0) B.push_back(*prev(temp.end()));
        }

    }
    else
    {
        now=k+1;
        while(now<N)
        {
            temp.clear();
            for(auto i:A)
            {
                temp.push_back(i);
                if(now<N)
                {
                    temp.push_back(now);
                    now++;
                }
            }
            tt=use_machine(temp);
            if(temp.size()>=2) 
            {
                ans+=(temp.size()-y-(tt+1)/2);
                if(tt%2==0) A.push_back(*prev(temp.end()));
            }
        }
    }
    ans+=y;
	return ans+1;
}

• Subtask 1: 0 / 100