Submission #1234056

#	Time	Username	Problem	Language	Result	Execution time	Memory
1234056		madamadam3	버섯 세기 (IOI20_mushrooms)	C++20	0 / 100	1 ms	420 KiB

mushrooms

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

using namespace std;

#ifdef LOCAL
	#define dbg(x) (cout << (x))
#else
	#define dbg(x)
#endif

using vi =vector<int>;
#define pb push_back
#define FOR(i, a, b) for (int i = a; i < b; i++)

int count_mushrooms(int n) {
	vi isa(n, 0); isa[0] = 1;

	int top_it = min(n, 200);
	for (int i = 1; i < top_it; i++) {
		isa[i] = 1 - use_machine(vi({0, i}));
	}

	if (top_it == n) return accumulate(isa.begin(), isa.end(), 0);

	vi filter_base(199, 0);
	int cur_pos = 0;
	for (int i = 0; i < 200 && cur_pos < 200; i++) {
		if (!isa[i]) continue;
		filter_base[cur_pos] = i;
		cur_pos += 2;
	}

	int tl_a = accumulate(isa.begin(), isa.end(), 0);
	for (int i = 200; i < n; i += 99) {
		int spots = min(99, n - i);
		vi filter(filter_base.begin(), filter_base.end());

		int ps = 1;
		for (int j = i; j < i + spots; j++) {
			filter[ps] = j;
			ps += 2;
		}

		int tl_non = use_machine(filter) / 2;
		tl_a += spots - tl_non;
	}

	return tl_a;
}

• Subtask 1: 0 / 100