Submission #613703

#	Time	Username	Problem	Language	Result	Execution time	Memory
613703		Jarif_Rahman	Counting Mushrooms (IOI20_mushrooms)	C++17	80.71 / 100	9 ms	460 KiB

mushrooms

#include "mushrooms.h"
#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;

int count_mushrooms(int n){
    vector<int> A, B;
    A.pb(0);

    int ls = n;

    for(int i = 1; i < n; i++){
        if(max(A.size(), B.size()) == 2){
            ls = i;
            break;
        }

        if(use_machine({0, i})) B.pb(i);
        else A.pb(i);
    }

    int ans = A.size();

    while(ls < n){
        if(A.size() > B.size()){
            int k = A.size();
            vector<int> Q;
            for(int i = 0; i < k; i++){
                Q.pb(A[i]);
                if(ls+i < min(n, ls+k)) Q.pb(ls+i);
            }
            int x = use_machine(Q);
            ans+=min(n, ls+k)-ls-x%2-x/2;
            if(x%2) B.pb(ls+k-1);
            else A.pb(ls+k-1);
            ls+=k;
        }
        else{
            int k = B.size();
            vector<int> Q;
            for(int i = 0; i < k; i++){
                Q.pb(B[i]);
                if(ls+i < min(n, ls+k)) Q.pb(ls+i);
            }
            int x = use_machine(Q);
            ans+=x%2+x/2;
            if(x%2) A.pb(ls+k-1);
            else B.pb(ls+k-1);
            ls+=k;
        }
    }

    return ans;
}

• Subtask 1: 80.7143 / 100