oj.uz

Submission #1069413

# Submission time Handle Problem Language Result Execution time Memory
1069413 2024-08-21T21:49:00 Z GusterGoose27 Counting Mushrooms (IOI20_mushrooms) C++17
92.2449 / 100
 8 ms 724 KB 
#include "mushrooms.h"
#include <bits/stdc++.h>
using namespace std;

#define sz(s) ((int)s.size())

const int inf = 1e9;

void print(vector<int> &a) {
	for (int v: a) cout << v << ' ';
	cout << '\n';	
}

int count_mushrooms(int n) {
	if (n < 10) {
		int s = 1;
		for (int i = 0; i < n-1; i++) s += 1-use_machine(vector<int>({0, i+1}));
		return s;
	}
	int bst = inf;
	int num_it = -1;
	for (int i = 0; i < n; i++) { // how many iterations to go through before starting main seq
		int steps = i+2;
		int found = 3+2*i;
		int num_processed = 3+2*i;
		while (found < n) {
			steps++;
			found += (1+num_processed)/2;
			num_processed++;
		}
		if (steps < bst) {
			bst = steps;
			num_it = i;
		}
	}
	vector<int> tp[2];
	tp[0].push_back(0);
	int cutoff = num_it + 2;
	int l = 1;
	for (; l < n && max(sz(tp[0]), sz(tp[1])) < cutoff; ) {
		// print(tp[0]);
		// print(tp[1]);
		vector<int> m;
		bool x = sz(tp[1])>sz(tp[0]);
		int csz = sz(tp[x]);
		m.push_back(tp[x][0]);
		m.push_back(l++);
		if (csz > 1) {
			m.push_back(tp[x][1]);
			m.push_back(l++);
		}
		int v = use_machine(m);
		tp[x^(v&1)].push_back(l-1);
		if (csz > 1) {
			tp[x^((v/2)&1)].push_back(l-2);
		}
	}
	// print(tp[0]);
	// print(tp[1]);
	int s = 0;
	while (l < n) {
		bool x = sz(tp[1])>sz(tp[0]);
		vector<int> m;
		int num_processed = min(sz(tp[x]), n-l);
		for (int i: tp[x]) {
			m.push_back(i);
			if (l < n) m.push_back(l++);
		}
		int v = use_machine(m);
		int num_bs = (v+(v&1))/2;
		s += x ? num_bs : (num_processed-num_bs);
		if (l < n) {
			tp[(v&1)^x].push_back(l-1);
			s -= (v&1)^x^1;
		}
	}
	// print(tp[0]);
	// print(tp[1]);
	return s + sz(tp[0]);
}

Subtask #1
92.2449 / 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 2 ms 344 KB Output is correct
7 Correct 5 ms 344 KB Output is correct
8 Correct 3 ms 344 KB Output is correct
9 Correct 5 ms 344 KB Output is correct
10 Correct 3 ms 344 KB Output is correct
11 Partially correct 4 ms 344 KB Output is partially correct
12 Correct 3 ms 448 KB Output is correct
13 Correct 3 ms 344 KB Output is correct
14 Correct 3 ms 444 KB Output is correct
15 Partially correct 3 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 Correct 3 ms 344 KB Output is correct
19 Partially correct 6 ms 344 KB Output is partially correct
20 Correct 3 ms 344 KB Output is correct
21 Correct 4 ms 344 KB Output is correct
22 Partially correct 4 ms 344 KB Output is partially correct
23 Correct 3 ms 344 KB Output is correct
24 Correct 2 ms 344 KB Output is correct
25 Partially correct 7 ms 456 KB Output is partially correct
26 Partially correct 4 ms 344 KB Output is partially correct
27 Partially correct 4 ms 464 KB Output is partially correct
28 Partially correct 3 ms 344 KB Output is partially correct
29 Partially correct 4 ms 340 KB Output is partially correct
30 Partially correct 3 ms 344 KB Output is partially correct
31 Partially correct 4 ms 700 KB Output is partially correct
32 Partially correct 3 ms 344 KB Output is partially correct
33 Partially correct 4 ms 460 KB Output is partially correct
34 Partially correct 6 ms 444 KB Output is partially correct
35 Partially correct 4 ms 344 KB Output is partially correct
36 Partially correct 4 ms 344 KB Output is partially correct
37 Partially correct 4 ms 712 KB Output is partially correct
38 Partially correct 3 ms 344 KB Output is partially correct
39 Partially correct 4 ms 344 KB Output is partially correct
40 Partially correct 3 ms 464 KB Output is partially correct
41 Partially correct 3 ms 344 KB Output is partially correct
42 Partially correct 4 ms 344 KB Output is partially correct
43 Partially correct 6 ms 344 KB Output is partially correct
44 Partially correct 4 ms 344 KB Output is partially correct
45 Partially correct 3 ms 344 KB Output is partially correct
46 Partially correct 4 ms 344 KB Output is partially correct
47 Partially correct 4 ms 344 KB Output is partially correct
48 Partially correct 4 ms 344 KB Output is partially correct
49 Partially correct 7 ms 600 KB Output is partially correct
50 Partially correct 3 ms 344 KB Output is partially correct
51 Partially correct 6 ms 476 KB Output is partially correct
52 Partially correct 7 ms 600 KB Output is partially correct
53 Partially correct 3 ms 344 KB Output is partially correct
54 Partially correct 6 ms 460 KB Output is partially correct
55 Partially correct 4 ms 456 KB Output is partially correct
56 Partially correct 7 ms 344 KB Output is partially correct
57 Partially correct 7 ms 344 KB Output is partially correct
58 Partially correct 7 ms 468 KB Output is partially correct
59 Partially correct 8 ms 344 KB Output is partially correct
60 Partially correct 8 ms 344 KB Output is partially correct
61 Partially correct 8 ms 724 KB Output is partially correct
62 Correct 1 ms 344 KB Output is correct
63 Correct 0 ms 344 KB Output is correct
64 Correct 1 ms 596 KB Output is correct
65 Correct 1 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 0 ms 344 KB Output is correct
71 Correct 0 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 1 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 1 ms 344 KB Output is correct
80 Correct 1 ms 344 KB Output is correct
81 Correct 1 ms 344 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 1 ms 344 KB Output is correct
87 Correct 0 ms 344 KB Output is correct
88 Correct 1 ms 340 KB Output is correct
89 Correct 0 ms 344 KB Output is correct
90 Correct 0 ms 340 KB Output is correct
91 Correct 0 ms 344 KB Output is correct