Submission #1186694

#	Time	Username	Problem	Language	Result	Execution time	Memory
1186694		the_coding_pooh	Counting Mushrooms (IOI20_mushrooms)	C++20	56.93 / 100	3 ms	428 KiB

mushrooms

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

#define uwu return

using namespace std;

const int MAGIC = 100;

int count_mushrooms(int n) {
	vector <int> A, B;
	A.push_back(0);
	for(int i = 1; i < min(n, 2 * MAGIC); i++){
		if(use_machine({0, i}))
			B.push_back(i);
		else
			A.push_back(i);
	}
	if(n - 1 <= 2 * MAGIC)
		return A.size();
	int cnt_a = 0;
	for(int k = 2 * MAGIC; k < n; k += MAGIC){
		if(A.size() >= MAGIC){
			vector <int> tmp;
			for(int i = 0; i < MAGIC && k + i < n; i++){
				tmp.push_back(A[i]);
				tmp.push_back(k + i);
			}
			cnt_a += tmp.size() / 2 - (use_machine(tmp) + 1) / 2;
		}
		else{	
			vector <int> tmp;
			for(int i = 0; i < MAGIC && k + i < n; i++){
				tmp.push_back(B[i]);
				tmp.push_back(k + i);
			}
			cnt_a += (use_machine(tmp) + 1) / 2;
		}
	}
	return cnt_a + A.size();
}

• Subtask 1: 56.927 / 100