Submission #1066174

#	Time	Username	Problem	Language	Result	Execution time	Memory
1066174		Ahmed57	Counting Mushrooms (IOI20_mushrooms)	C++17	56.93 / 100	6 ms	600 KiB

mushrooms

#include "bits/stdc++.h"
using namespace std;
#include "mushrooms.h"
 
int count_mushrooms(int n){
    int B = 187;
    vector<int> BS[2];
    int cnt = 1;
    vector<int> pending;
    BS[0].push_back(0);
    for(int i = 1;i<min(n,B);i++){
        if(use_machine({0,i})){
            BS[1].push_back(i);
        }else {
            BS[0].push_back(i);cnt++;
        }
    }
    int sz = max(BS[0].size(),BS[1].size());
    vector<int> bs;
    bool As = 0;
    if(BS[0].size()>BS[1].size()){
        As = 1;
        bs = BS[0];
    }else bs = BS[1];
    for(int i = B;i<n;i+=sz){
        int xd = i;
        vector<int> lol;
        int nah = 0;
 
        for(int j = i;j<min(n,i+sz);j++){
            nah++;
            lol.push_back(bs[j-i]);
            lol.push_back(j);
        }
        int ans = use_machine(lol);
        if(ans%2){
            if(As==0)cnt++;
            ans--;
        }else{
            if(As==1)cnt++;
        }
        ans/=2;
        nah--;
        if(As==0)cnt+=ans;
        else cnt+=nah-ans;
    }
    return cnt;
}

Compilation message (stderr)

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:26:13: warning: unused variable 'xd' [-Wunused-variable]
   26 |         int xd = i;
      |             ^~

• Subtask 1: 56.927 / 100