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Submission #828996

# Submission time Handle Problem Language Result Execution time Memory
828996 2023-08-17T23:22:10 Z d4xn Counting Mushrooms (IOI20_mushrooms) C++17
10 / 100
 154 ms 384 KB 
#include "mushrooms.h"
#include <bits/stdc++.h>

using namespace std;

const int B = 3;

mt19937 rng(9679 + time(nullptr) + chrono::steady_clock::now().time_since_epoch().count() + (uint64_t) new char);

//int cnt;
vector<int> v;

int solve(int l, int r) {
	if (l > r) return 0;
	int sz = r-l+1;
	shuffle(v.begin()+l, v.begin()+r+1, rng);
	
	vector<int> a;
	a.push_back(0);
	for (int i = l; i <= r; i++) {
		a.push_back(v[i]);
	}

	int x = use_machine(a);

	if (!x) return sz;
	else if (x == sz) {
		return sz/2;
	}
	else {
		//int mid = (l+r)/2;
		//int mid = rng() % (r-l) + l; 

		if (x == 1) {
			if (use_machine({a[0], a[1]})) return 0;
			else {
				if (use_machine({a[0], a[2]})) return 1;
				else return 2;
			}
		}
		else {
			int y = 3;
			if (use_machine({a[0], a[1]})) y--;
			if (use_machine({a[0], a[2]})) y--;
			return y;
		}

		/*
		int y = solve(l, mid);

		if (y != sz - (x+1)/2) y += solve(mid+1, r);
		return y;
		*/
	}
}

int count_mushrooms(int n) {
	v.resize(n);
	for (int i = 0; i < n; i++) v[i] = i;

	int ans = 1;
	for (int i = 1; i < n; i += B) {
		ans += solve(i, min(n-1, i+B-1));
	}
	return ans;
}

Subtask #1
10.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 0 ms 208 KB Output is correct
3 Correct 0 ms 208 KB Output is correct
4 Correct 0 ms 208 KB Output is correct
5 Correct 1 ms 208 KB Output is correct
6 Partially correct 9 ms 208 KB Output is partially correct
7 Partially correct 61 ms 336 KB Output is partially correct
8 Partially correct 45 ms 336 KB Output is partially correct
9 Partially correct 60 ms 336 KB Output is partially correct
10 Partially correct 66 ms 336 KB Output is partially correct
11 Partially correct 115 ms 336 KB Output is partially correct
12 Partially correct 115 ms 336 KB Output is partially correct
13 Partially correct 122 ms 336 KB Output is partially correct
14 Partially correct 54 ms 336 KB Output is partially correct
15 Partially correct 115 ms 336 KB Output is partially correct
16 Partially correct 105 ms 336 KB Output is partially correct
17 Partially correct 41 ms 336 KB Output is partially correct
18 Partially correct 117 ms 384 KB Output is partially correct
19 Partially correct 60 ms 336 KB Output is partially correct
20 Partially correct 121 ms 384 KB Output is partially correct
21 Partially correct 113 ms 336 KB Output is partially correct
22 Partially correct 146 ms 336 KB Output is partially correct
23 Partially correct 116 ms 336 KB Output is partially correct
24 Partially correct 59 ms 336 KB Output is partially correct
25 Partially correct 84 ms 336 KB Output is partially correct
26 Partially correct 109 ms 336 KB Output is partially correct
27 Partially correct 102 ms 336 KB Output is partially correct
28 Partially correct 123 ms 336 KB Output is partially correct
29 Partially correct 104 ms 336 KB Output is partially correct
30 Partially correct 154 ms 336 KB Output is partially correct
31 Partially correct 108 ms 384 KB Output is partially correct
32 Partially correct 151 ms 336 KB Output is partially correct
33 Partially correct 84 ms 336 KB Output is partially correct
34 Partially correct 111 ms 336 KB Output is partially correct
35 Partially correct 124 ms 336 KB Output is partially correct
36 Partially correct 97 ms 336 KB Output is partially correct
37 Partially correct 90 ms 384 KB Output is partially correct
38 Partially correct 118 ms 336 KB Output is partially correct
39 Partially correct 109 ms 336 KB Output is partially correct
40 Partially correct 60 ms 336 KB Output is partially correct
41 Partially correct 113 ms 384 KB Output is partially correct
42 Partially correct 68 ms 336 KB Output is partially correct
43 Partially correct 90 ms 336 KB Output is partially correct
44 Partially correct 86 ms 336 KB Output is partially correct
45 Partially correct 89 ms 336 KB Output is partially correct
46 Partially correct 56 ms 336 KB Output is partially correct
47 Partially correct 110 ms 336 KB Output is partially correct
48 Partially correct 80 ms 336 KB Output is partially correct
49 Partially correct 107 ms 336 KB Output is partially correct
50 Partially correct 120 ms 336 KB Output is partially correct
51 Partially correct 67 ms 336 KB Output is partially correct
52 Partially correct 125 ms 336 KB Output is partially correct
53 Partially correct 120 ms 336 KB Output is partially correct
54 Partially correct 91 ms 336 KB Output is partially correct
55 Partially correct 70 ms 384 KB Output is partially correct
56 Partially correct 64 ms 336 KB Output is partially correct
57 Partially correct 70 ms 336 KB Output is partially correct
58 Partially correct 88 ms 336 KB Output is partially correct
59 Partially correct 110 ms 336 KB Output is partially correct
60 Partially correct 150 ms 384 KB Output is partially correct
61 Partially correct 115 ms 336 KB Output is partially correct
62 Correct 0 ms 208 KB Output is correct
63 Correct 0 ms 208 KB Output is correct
64 Correct 0 ms 208 KB Output is correct
65 Correct 0 ms 208 KB Output is correct
66 Correct 0 ms 208 KB Output is correct
67 Correct 0 ms 208 KB Output is correct
68 Correct 1 ms 256 KB Output is correct
69 Correct 1 ms 208 KB Output is correct
70 Correct 0 ms 244 KB Output is correct
71 Correct 1 ms 208 KB Output is correct
72 Correct 0 ms 256 KB Output is correct
73 Correct 1 ms 208 KB Output is correct
74 Correct 0 ms 208 KB Output is correct
75 Correct 0 ms 208 KB Output is correct
76 Correct 0 ms 208 KB Output is correct
77 Correct 0 ms 208 KB Output is correct
78 Correct 0 ms 208 KB Output is correct
79 Correct 0 ms 208 KB Output is correct
80 Correct 1 ms 208 KB Output is correct
81 Correct 0 ms 208 KB Output is correct
82 Correct 1 ms 208 KB Output is correct
83 Correct 0 ms 248 KB Output is correct
84 Correct 0 ms 208 KB Output is correct
85 Correct 0 ms 208 KB Output is correct
86 Correct 0 ms 208 KB Output is correct
87 Correct 0 ms 208 KB Output is correct
88 Correct 1 ms 208 KB Output is correct
89 Correct 0 ms 208 KB Output is correct
90 Correct 0 ms 208 KB Output is correct
91 Correct 0 ms 208 KB Output is correct