Submission #825488

#	Time	Username	Problem	Language	Result	Execution time	Memory
825488		benjaminkleyn	Counting Mushrooms (IOI20_mushrooms)	C++17	80.71 / 100	8 ms	456 KiB

mushrooms

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

int count_mushrooms(int n)
{
    vector<int> A(1, 0), B;
    int i = 1;
    int cnt = A.size();
    while (i < n)
    {
        vector<int> query;
        if (A.size() >= B.size())
        {
            for (int j : A)
            {
                query.push_back(j);
                query.push_back(i++);
                if (i >= n)
                    break;
            }
            int x = use_machine(query);
            cnt += query.size() / 2 - (x + 1) / 2;
            if (x % 2)
                B.push_back(query.back());
            else
                A.push_back(query.back());
        }
        else
        {
            for (int j : B)
            {
                query.push_back(j);
                query.push_back(i++);
                if (i >= n)
                    break;
            }
            int x = use_machine(query);
            cnt += (x + 1) / 2;
            if (x % 2)
                A.push_back(query.back());
            else
                B.push_back(query.back());
        }
    }
    return cnt;
}

• Subtask 1: 80.7143 / 100