oj.uz

Submission #1005789

# Submission time Handle Problem Language Result Execution time Memory
1005789 2024-06-23T05:03:26 Z thinknoexit Counting Mushrooms (IOI20_mushrooms) C++17
53.8095 / 100
 7 ms 600 KB 
#include "mushrooms.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int n;
int count_mushrooms(int N) {
	n = N;
	if (n <= 451) {
		int ans = 1;
		for (int i = 2;i < n;i += 2) {
			int v = use_machine({ i - 1, 0, i });
			if (v == 1) ans++;
			else if (v == 0) ans += 2;
		}
		if ((n - 1) & 1) {
			if (!use_machine({ 0, n - 1 })) ans++;
		}
		return ans;
	}
	int sq = sqrt(n);
	vector<int> A, B;
	vector<int> P(n - 1);
	iota(P.begin(), P.end(), 1);
	random_shuffle(P.begin(), P.end());
	A.push_back(0);
	int p;
	for (p = 2;p < n && (int)A.size() < sq && (int)B.size() < sq;p += 2) {
		int v = use_machine({ P[p - 1], 0, P[p - 2] });
		if (v == 0) {
			A.push_back(P[p - 1]);
			A.push_back(P[p - 2]);
		}
		else if (v == 2) {
			B.push_back(P[p - 1]);
			B.push_back(P[p - 2]);
		}
		else {
			if (use_machine({ 0, P[p - 1] })) B.push_back(P[p - 1]), A.push_back(P[p - 2]);
			else B.push_back(P[p - 2]), A.push_back(P[p - 1]);
		}
	}
	p--;
	// count A from p -> n - 1
	int ans = A.size();
	if (A.size() > B.size()) {
		int sz = A.size();
		for (int i = p, j;i < n;i = j) {
			vector<int> Q;
			for (j = i;j < min(n, i + sz - 1);j++) {
				Q.push_back(P[j - 1]);
				Q.push_back(A[j - i]);
			}
			int v = use_machine(Q);
			int s = Q.size();
			ans += (s - v) / 2;
		}
	}
	else {
		int sz = B.size();
		for (int i = p, j;i < n;i = j) {
			vector<int> Q;
			for (j = i;j < min(n, i + sz - 1);j++) {
				Q.push_back(P[j - 1]);
				Q.push_back(B[j - i]);
			}
			int v = use_machine(Q);
			ans += (v + 1) / 2;
		}
	}
	return ans;
}

Subtask #1
53.8095 / 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 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 4 ms 344 KB Output is correct
8 Correct 4 ms 344 KB Output is correct
9 Correct 4 ms 344 KB Output is correct
10 Partially correct 4 ms 344 KB Output is partially correct
11 Partially correct 5 ms 344 KB Output is partially correct
12 Partially correct 4 ms 524 KB Output is partially correct
13 Correct 4 ms 600 KB Output is correct
14 Partially correct 3 ms 344 KB Output is partially correct
15 Partially correct 4 ms 344 KB Output is partially correct
16 Partially correct 4 ms 344 KB Output is partially correct
17 Correct 2 ms 344 KB Output is correct
18 Partially correct 4 ms 344 KB Output is partially correct
19 Partially correct 4 ms 344 KB Output is partially correct
20 Partially correct 4 ms 344 KB Output is partially correct
21 Partially correct 4 ms 344 KB Output is partially correct
22 Partially correct 4 ms 344 KB Output is partially correct
23 Partially correct 4 ms 524 KB Output is partially correct
24 Partially correct 3 ms 344 KB Output is partially correct
25 Partially correct 4 ms 524 KB Output is partially correct
26 Partially correct 4 ms 344 KB Output is partially correct
27 Partially correct 4 ms 344 KB Output is partially correct
28 Partially correct 4 ms 344 KB Output is partially correct
29 Partially correct 5 ms 344 KB Output is partially correct
30 Partially correct 5 ms 344 KB Output is partially correct
31 Partially correct 5 ms 600 KB Output is partially correct
32 Partially correct 5 ms 344 KB Output is partially correct
33 Partially correct 4 ms 524 KB Output is partially correct
34 Partially correct 4 ms 344 KB Output is partially correct
35 Partially correct 7 ms 344 KB Output is partially correct
36 Partially correct 6 ms 344 KB Output is partially correct
37 Partially correct 4 ms 344 KB Output is partially correct
38 Partially correct 5 ms 344 KB Output is partially correct
39 Partially correct 4 ms 520 KB Output is partially correct
40 Partially correct 4 ms 344 KB Output is partially correct
41 Partially correct 4 ms 344 KB Output is partially correct
42 Partially correct 5 ms 344 KB Output is partially correct
43 Partially correct 5 ms 344 KB Output is partially correct
44 Partially correct 7 ms 344 KB Output is partially correct
45 Partially correct 6 ms 344 KB Output is partially correct
46 Partially correct 4 ms 344 KB Output is partially correct
47 Partially correct 5 ms 344 KB Output is partially correct
48 Partially correct 4 ms 520 KB Output is partially correct
49 Partially correct 5 ms 344 KB Output is partially correct
50 Partially correct 4 ms 344 KB Output is partially correct
51 Partially correct 4 ms 524 KB Output is partially correct
52 Partially correct 5 ms 344 KB Output is partially correct
53 Partially correct 4 ms 344 KB Output is partially correct
54 Partially correct 4 ms 344 KB Output is partially correct
55 Partially correct 6 ms 344 KB Output is partially correct
56 Partially correct 5 ms 516 KB Output is partially correct
57 Partially correct 5 ms 524 KB Output is partially correct
58 Partially correct 4 ms 344 KB Output is partially correct
59 Partially correct 4 ms 344 KB Output is partially correct
60 Partially correct 5 ms 344 KB Output is partially correct
61 Partially correct 7 ms 344 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 1 ms 344 KB Output is correct
69 Correct 0 ms 344 KB Output is correct
70 Correct 0 ms 344 KB Output is correct
71 Correct 0 ms 344 KB Output is correct
72 Correct 0 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 0 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 344 KB Output is correct
82 Correct 0 ms 344 KB Output is correct
83 Correct 0 ms 356 KB Output is correct
84 Correct 0 ms 344 KB Output is correct
85 Correct 0 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 0 ms 344 KB Output is correct
90 Correct 1 ms 344 KB Output is correct
91 Correct 0 ms 344 KB Output is correct