Submission #800706

#	Time	Username	Problem	Language	Result	Execution time	Memory
800706		FEDIKUS	Counting Mushrooms (IOI20_mushrooms)	C++17	92.24 / 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;
	int w=100;
	for(int i=1;i<n;i++){
		if(max(aovi.size(),bovi.size())<2){
			int sta=use_machine({0,i});
			if(sta==1) bovi.push_back(i);
			else aovi.push_back(i);
			ret=aovi.size();
			continue;
		}

		bool zamenio=false;
		if(bovi.size()>=aovi.size()){swap(aovi,bovi); zamenio=true;}
		int uzimam=int(aovi.size())>=w ? int(aovi.size()):2;

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

		if(zamenio) swap(aovi,bovi);
	}
	return ret;
}

• Subtask 1: 92.2449 / 100