oj.uz

Submission #304312

# Submission time Handle Problem Language Result Execution time Memory
304312 2020-09-21T06:01:43 Z llaki Counting Mushrooms (IOI20_mushrooms) C++14
53.0516 / 100
 15 ms 672 KB 
#include <math.h>
#include "mushrooms.h"
 
int count_mushrooms(int n) {
	if (n <= 226) {
		std::vector<int> m;
		int ans = 1;
		for (int i = 1; i < n; i++) {
			m = {0, i};
			int res = use_machine(m);
			if (res == 0) ans++;
		}
		return ans;
	}
	int k = (int) (sqrt(n));
	std::vector<int> ones, zeroes;
	int known[20001];
	for (int i = 0; i <= 20000; i++) {
		known[i] = 0;
	}
	for (int q = 0; ; q++) {
		if (1 + q * k >= n) break;
		std::vector<int> query;
		query.push_back(0);
		for (int i = 1; i <= k; i++) {
			int num = i + q * k;
			if (num >= n) break;
			query.push_back(num);
		}
		int res = use_machine(query);
		int largest = query[query.size() - 1];
		if (res % 2 == 0) {
			zeroes.push_back(largest);
		} else {
			ones.push_back(largest);
		}
		known[largest] = 1;
	}
	int countZeroes = 1 + zeroes.size();
	std::vector<int> unknown;
	for (int i = 1; i < n; i++) {
		if (known[i] != 1) {
			unknown.push_back(i);
		}
	}
	std::vector<int> indices = (ones.size() > zeroes.size() ? ones : zeroes);
	bool isOne = ones.size() > zeroes.size();
	int s = indices.size();
	for (int i = 0; i < unknown.size(); i++) {
		std::vector<int> query;
		query.push_back(indices[0]);
		int u = 0;
		for (int j = 1; j < s && i + j - 1 < unknown.size(); j++) {
			query.push_back(unknown[i + j - 1]);
			query.push_back(indices[j]);
			u++;
		}
		if (query.size() < 2) break;
		int res = use_machine(query);
		if (isOne) {
			countZeroes += res / 2;
		} else {
			countZeroes += u - res / 2;
		}
		i = i + s - 2;
	}
	return countZeroes;
}

Compilation message

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:49:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |  for (int i = 0; i < unknown.size(); i++) {
      |                  ~~^~~~~~~~~~~~~~~~
mushrooms.cpp:53:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |   for (int j = 1; j < s && i + j - 1 < unknown.size(); j++) {
      |                            ~~~~~~~~~~^~~~~~~~~~~~~~~~

Subtask #1
53.0516 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Partially correct 8 ms 600 KB Output is partially correct
8 Partially correct 11 ms 640 KB Output is partially correct
9 Partially correct 12 ms 640 KB Output is partially correct
10 Partially correct 12 ms 572 KB Output is partially correct
11 Partially correct 11 ms 640 KB Output is partially correct
12 Partially correct 11 ms 640 KB Output is partially correct
13 Partially correct 10 ms 640 KB Output is partially correct
14 Partially correct 6 ms 512 KB Output is partially correct
15 Partially correct 14 ms 640 KB Output is partially correct
16 Partially correct 13 ms 640 KB Output is partially correct
17 Partially correct 7 ms 512 KB Output is partially correct
18 Partially correct 12 ms 640 KB Output is partially correct
19 Partially correct 13 ms 640 KB Output is partially correct
20 Partially correct 15 ms 640 KB Output is partially correct
21 Partially correct 13 ms 640 KB Output is partially correct
22 Partially correct 13 ms 640 KB Output is partially correct
23 Partially correct 13 ms 632 KB Output is partially correct
24 Partially correct 6 ms 512 KB Output is partially correct
25 Partially correct 15 ms 640 KB Output is partially correct
26 Partially correct 13 ms 640 KB Output is partially correct
27 Partially correct 12 ms 576 KB Output is partially correct
28 Partially correct 12 ms 640 KB Output is partially correct
29 Partially correct 12 ms 640 KB Output is partially correct
30 Partially correct 11 ms 564 KB Output is partially correct
31 Partially correct 13 ms 640 KB Output is partially correct
32 Partially correct 11 ms 640 KB Output is partially correct
33 Partially correct 10 ms 568 KB Output is partially correct
34 Partially correct 9 ms 564 KB Output is partially correct
35 Partially correct 14 ms 572 KB Output is partially correct
36 Partially correct 12 ms 640 KB Output is partially correct
37 Partially correct 11 ms 568 KB Output is partially correct
38 Partially correct 12 ms 640 KB Output is partially correct
39 Partially correct 13 ms 560 KB Output is partially correct
40 Partially correct 13 ms 640 KB Output is partially correct
41 Partially correct 12 ms 564 KB Output is partially correct
42 Partially correct 12 ms 572 KB Output is partially correct
43 Partially correct 13 ms 640 KB Output is partially correct
44 Partially correct 12 ms 580 KB Output is partially correct
45 Partially correct 12 ms 572 KB Output is partially correct
46 Partially correct 11 ms 672 KB Output is partially correct
47 Partially correct 13 ms 640 KB Output is partially correct
48 Partially correct 12 ms 640 KB Output is partially correct
49 Partially correct 11 ms 640 KB Output is partially correct
50 Partially correct 11 ms 572 KB Output is partially correct
51 Partially correct 12 ms 640 KB Output is partially correct
52 Partially correct 11 ms 640 KB Output is partially correct
53 Partially correct 13 ms 640 KB Output is partially correct
54 Partially correct 14 ms 568 KB Output is partially correct
55 Partially correct 10 ms 572 KB Output is partially correct
56 Partially correct 13 ms 672 KB Output is partially correct
57 Partially correct 11 ms 640 KB Output is partially correct
58 Partially correct 12 ms 640 KB Output is partially correct
59 Partially correct 12 ms 640 KB Output is partially correct
60 Partially correct 14 ms 544 KB Output is partially correct
61 Partially correct 13 ms 640 KB Output is partially correct
62 Correct 0 ms 256 KB Output is correct
63 Correct 1 ms 256 KB Output is correct
64 Correct 0 ms 256 KB Output is correct
65 Correct 0 ms 256 KB Output is correct
66 Correct 0 ms 256 KB Output is correct
67 Correct 0 ms 256 KB Output is correct
68 Correct 1 ms 256 KB Output is correct
69 Correct 0 ms 256 KB Output is correct
70 Correct 0 ms 256 KB Output is correct
71 Correct 0 ms 256 KB Output is correct
72 Correct 0 ms 256 KB Output is correct
73 Correct 0 ms 256 KB Output is correct
74 Correct 1 ms 256 KB Output is correct
75 Correct 0 ms 256 KB Output is correct
76 Correct 0 ms 256 KB Output is correct
77 Correct 0 ms 256 KB Output is correct
78 Correct 0 ms 256 KB Output is correct
79 Correct 0 ms 256 KB Output is correct
80 Correct 0 ms 256 KB Output is correct
81 Correct 0 ms 256 KB Output is correct
82 Correct 0 ms 256 KB Output is correct
83 Correct 0 ms 256 KB Output is correct
84 Correct 0 ms 256 KB Output is correct
85 Correct 0 ms 256 KB Output is correct
86 Correct 0 ms 256 KB Output is correct
87 Correct 0 ms 256 KB Output is correct
88 Correct 0 ms 256 KB Output is correct
89 Correct 0 ms 256 KB Output is correct
90 Correct 1 ms 256 KB Output is correct
91 Correct 0 ms 256 KB Output is correct