Submission #800643

#	Time	Username	Problem	Language	Result	Execution time	Memory
800643		FEDIKUS	Counting Mushrooms (IOI20_mushrooms)	C++17	80.71 / 100	7 ms	348 KiB

mushrooms

#include "mushrooms.h"
#include <bits/stdc++.h>

using namespace std;

const int maxn=20010;

int count_mushrooms(int n) {
	vector<int> aovi={0};
	vector<int> bovi;
	int ret=1;
	for(int i=1;i<n;i++){
		if(aovi.size()>=bovi.size()){
			vector<int> tmp;
			for(int j=i;j<min(i+int(aovi.size()),n);j++){
				tmp.push_back(aovi[j-i]);
				tmp.push_back(j);
			}
			int klkb=use_machine(tmp);
			i+=aovi.size()-1;
			if(klkb&1) bovi.push_back(tmp.back());
			else aovi.push_back(tmp.back()); 
			klkb=klkb/2+(klkb&1);
			int klka=tmp.size()/2-klkb;
			ret+=klka;
		}else{
			vector<int> tmp;
			for(int j=i;j<min(i+int(bovi.size()),n);j++){
				tmp.push_back(bovi[j-i]);
				tmp.push_back(j);
			}
			int klka=use_machine(tmp);
			i+=bovi.size()-1;
			if(klka&1) aovi.push_back(tmp.back());
			else bovi.push_back(tmp.back());
			klka=klka/2+(klka&1);
			ret+=klka;
		}
	}
	return ret;
}

• Subtask 1: 80.7143 / 100