Submission #959391

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
959391	2024-04-08T06:42:01 Z	The_Samurai	Counting Mushrooms (IOI20_mushrooms)	C++17	27.0659 / 100	10 ms	856 KB

mushrooms

#include "mushrooms.h"
#include "bits/stdc++.h"
using namespace std;
 
int count_mushrooms(int n) {
	vector<int> zeros = {0};
	const int cnt = 50, b = 650;
	for (int l = 1, r = b; l < n and zeros.size() < cnt; l += b, r += b) {
		r = min(r, n - 1);
		vector<int> v = {0};
		for (int i = l; i <= r; i++) v.emplace_back(i);
		int x = use_machine(v);
		if (x == 0) {
			for (int i = l; i <= r; i++) zeros.emplace_back(i);
			continue;
		}
		if (x == 1) {
			for (int i = l; i <= r; i++) {
				if (use_machine({0, i})) break;
				zeros.emplace_back(i);
			}
			continue;
		}
		while (zeros.size() < cnt) {
			if (zeros.back() + 1 > r) break;
			int lx = max(l, zeros.back() + 1), rx = r, best = -1;
			int start = max(l, zeros.back() + 1);
			bool found = false;
			if (use_machine({0, lx}) == 0) {
				zeros.emplace_back(lx);
				continue;
			}
			lx++;
			// cout << lx << ' ' << rx << endl;
			while (lx <= rx) {
				int mid = (lx + rx) >> 1;
				v = {0};
				for (int i = start; i <= mid; i++) v.emplace_back(i);
				x = use_machine(v);
				// cout << '\t' << mid << ' ' << x << endl;
				if (x >= 2) {
					rx = mid - 1;
					best = mid;
				} else if (x == 0) {
					for (int i = start; i <= mid; i++) zeros.emplace_back(i);
					found = true;
					break;
				} else {
					lx = mid + 1;
				}
			}
			if (found) continue;
			if (best == -1) break;
			zeros.emplace_back(best);
		}
	}
	// for (int x: zeros) cout << x << ' ';
	// cout << endl;
	if (zeros.size() < cnt) return zeros.size();
	vector<int> unused;
	for (int i = zeros.back() + 1; i < n; i++) unused.emplace_back(i);
	int ans = zeros.size();
	while (!unused.empty()) {
		int ln = min(unused.size(), zeros.size());
		vector<int> v;
		for (int i = 0; i < ln; i++) {
			v.emplace_back(zeros[i]);
			v.emplace_back(unused.back());
			unused.pop_back();
		}
		ans += ln - (use_machine(v) + 1) / 2;
	}
	return ans;
}

Subtask #1

27.0659 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	344 KB	Output is correct
2	Correct	0 ms	344 KB	Output is correct
3	Correct	0 ms	344 KB	Output is correct
4	Correct	0 ms	344 KB	Output is correct
5	Partially correct	2 ms	444 KB	Output is partially correct
6	Partially correct	3 ms	456 KB	Output is partially correct
7	Correct	3 ms	668 KB	Output is correct
8	Partially correct	6 ms	460 KB	Output is partially correct
9	Partially correct	6 ms	452 KB	Output is partially correct
10	Partially correct	8 ms	600 KB	Output is partially correct
11	Partially correct	9 ms	612 KB	Output is partially correct
12	Partially correct	10 ms	456 KB	Output is partially correct
13	Partially correct	9 ms	476 KB	Output is partially correct
14	Partially correct	5 ms	556 KB	Output is partially correct
15	Partially correct	8 ms	452 KB	Output is partially correct
16	Partially correct	7 ms	452 KB	Output is partially correct
17	Partially correct	6 ms	564 KB	Output is partially correct
18	Partially correct	8 ms	856 KB	Output is partially correct
19	Partially correct	9 ms	460 KB	Output is partially correct
20	Partially correct	6 ms	460 KB	Output is partially correct
21	Partially correct	7 ms	456 KB	Output is partially correct
22	Partially correct	8 ms	456 KB	Output is partially correct
23	Partially correct	6 ms	452 KB	Output is partially correct
24	Partially correct	6 ms	704 KB	Output is partially correct
25	Partially correct	8 ms	456 KB	Output is partially correct
26	Partially correct	7 ms	460 KB	Output is partially correct
27	Partially correct	7 ms	452 KB	Output is partially correct
28	Partially correct	8 ms	452 KB	Output is partially correct
29	Partially correct	9 ms	456 KB	Output is partially correct
30	Partially correct	7 ms	704 KB	Output is partially correct
31	Partially correct	7 ms	456 KB	Output is partially correct
32	Partially correct	7 ms	456 KB	Output is partially correct
33	Partially correct	8 ms	456 KB	Output is partially correct
34	Partially correct	8 ms	584 KB	Output is partially correct
35	Partially correct	7 ms	452 KB	Output is partially correct
36	Partially correct	9 ms	452 KB	Output is partially correct
37	Partially correct	7 ms	708 KB	Output is partially correct
38	Partially correct	8 ms	460 KB	Output is partially correct
39	Partially correct	7 ms	452 KB	Output is partially correct
40	Partially correct	9 ms	456 KB	Output is partially correct
41	Partially correct	7 ms	456 KB	Output is partially correct
42	Partially correct	8 ms	584 KB	Output is partially correct
43	Partially correct	8 ms	460 KB	Output is partially correct
44	Partially correct	8 ms	452 KB	Output is partially correct
45	Partially correct	7 ms	456 KB	Output is partially correct
46	Partially correct	8 ms	452 KB	Output is partially correct
47	Partially correct	7 ms	460 KB	Output is partially correct
48	Partially correct	7 ms	512 KB	Output is partially correct
49	Partially correct	8 ms	456 KB	Output is partially correct
50	Partially correct	10 ms	456 KB	Output is partially correct
51	Partially correct	8 ms	456 KB	Output is partially correct
52	Partially correct	7 ms	460 KB	Output is partially correct
53	Partially correct	7 ms	564 KB	Output is partially correct
54	Partially correct	8 ms	452 KB	Output is partially correct
55	Partially correct	7 ms	452 KB	Output is partially correct
56	Partially correct	7 ms	452 KB	Output is partially correct
57	Partially correct	7 ms	704 KB	Output is partially correct
58	Partially correct	7 ms	460 KB	Output is partially correct
59	Partially correct	7 ms	456 KB	Output is partially correct
60	Partially correct	9 ms	708 KB	Output is partially correct
61	Partially correct	8 ms	456 KB	Output is partially correct
62	Correct	0 ms	344 KB	Output is correct
63	Correct	0 ms	344 KB	Output is correct
64	Correct	0 ms	344 KB	Output is correct
65	Correct	0 ms	344 KB	Output is correct
66	Correct	0 ms	344 KB	Output is correct
67	Correct	0 ms	344 KB	Output is correct
68	Correct	0 ms	344 KB	Output is correct
69	Correct	0 ms	344 KB	Output is correct
70	Correct	1 ms	344 KB	Output is correct
71	Correct	1 ms	344 KB	Output is correct
72	Correct	1 ms	344 KB	Output is correct
73	Correct	0 ms	344 KB	Output is correct
74	Correct	0 ms	344 KB	Output is correct
75	Correct	1 ms	344 KB	Output is correct
76	Correct	0 ms	344 KB	Output is correct
77	Correct	0 ms	344 KB	Output is correct
78	Correct	0 ms	344 KB	Output is correct
79	Correct	0 ms	344 KB	Output is correct
80	Correct	0 ms	344 KB	Output is correct
81	Correct	0 ms	596 KB	Output is correct
82	Correct	0 ms	344 KB	Output is correct
83	Correct	0 ms	344 KB	Output is correct
84	Correct	0 ms	344 KB	Output is correct
85	Correct	1 ms	344 KB	Output is correct
86	Correct	0 ms	344 KB	Output is correct
87	Correct	0 ms	344 KB	Output is correct
88	Correct	0 ms	344 KB	Output is correct
89	Correct	1 ms	344 KB	Output is correct
90	Correct	1 ms	344 KB	Output is correct
91	Correct	0 ms	344 KB	Output is correct