Submission #1054680

#	Time	Username	Problem	Language	Result	Execution time	Memory
1054680		Gromp15	Counting Mushrooms (IOI20_mushrooms)	C++17	56.78 / 100	6 ms	600 KiB

mushrooms

#include <bits/stdc++.h>
#include "mushrooms.h"
#define sz(x) (int)x.size()
using namespace std;

const int len = 200;

int count_mushrooms(int n) {
	vector<int> A{0}, B;
	for (int i = 1; i < min(n, len + 1); i++) {
		(use_machine({0, i}) ? B : A).push_back(i);
	}
	int ans = A.size();
	bool inv = 0;
	if (A.size() < B.size()) swap(A, B), inv = 1;
	/*
	for (int x : A) cout << x << " ";
	cout << '\n';
	for (int x : B) cout << x << " ";
	cout << '\n';
	*/
	vector<int> cur{A[0]};
	for (int j = len + 1, on = 1; j < n; j++) {
		if (on == sz(A)) {
			int res = use_machine(cur);
			ans += inv ? res / 2 : sz(cur) - sz(A) - res / 2;
			cur.clear();
			cur.emplace_back(A[0]);
			on = 1;
		}
		cur.emplace_back(j);
		cur.emplace_back(A[on++]);
	}
	//cout << "LST " << cur.size()<< '\n';
	if (cur.size() > 1) {
		int res = use_machine(cur);
		//cout << "R " << res << " " << ans << '\n';
		ans += inv ? res / 2 : sz(cur) / 2 - res / 2;
	}
	return ans;
}

• Subtask 1: 56.7839 / 100