Submission #824029

#	Time	Username	Problem	Language	Result	Execution time	Memory
824029		Abrar_Al_Samit	Counting Mushrooms (IOI20_mushrooms)	C++17	25 / 100	91 ms	384 KiB

mushrooms

#include <bits/stdc++.h>
#include "mushrooms.h"
using namespace std;

int count_mushrooms(int n) {
	vector<int>mac;

	int c1 = use_machine(mac = {0, 1});
	if(n==2) return 1 + 1-c1;

	int c2 = use_machine(mac = {0, 2});

	int tp[n];
	tp[0] = 1;
	tp[1] = 1-c1;
	tp[2] = 1-c2;

	int s1, s2;
	if(c1 && c2) s1 = 1, s2 = 2;
	else {
		s1 = 0;
		if(c1) s2 = 2;
		else s2 = 1;
	}

	for(int i=3; i<n; i+=2) {
		if(i==n-1) {
			tp[i] = 1 - use_machine(mac = {0, i});
		} else {
			int c = use_machine(mac = {i, s1, i+1, s2});
			if(c==0) {
				tp[i] = tp[i+1] = tp[s1];
			} else if(c==1) {
				tp[i] = 1-tp[s1];
				tp[i+1] = tp[s1];
			} else if(c==2) {
				tp[i+1] = 1-tp[s1];
				tp[i] = tp[s1];
			} else {
				tp[i] = tp[i+1] = 1-tp[s1];
			}
		}
	}
	return accumulate(tp, tp+n, 0);
}

• Subtask 1: 25 / 100