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Submission #481772

# Submission time Handle Problem Language Result Execution time Memory
481772 2021-10-21T18:52:40 Z blue Counting Mushrooms (IOI20_mushrooms) C++17
79.5775 / 100
 10 ms 328 KB 
#include "mushrooms.h"
#include <vector>
#include <iostream>
using namespace std;

const int X = 250; //199

int ceil_div(int a, int b)
{
    return a/b + bool(a%b);
}

int count_mushrooms(int n)
{
    if(n <= 227)
    {
      int ans = 1;
      for(int i = 1; i < n; i++) ans += !use_machine(vector<int>{0, i});
      return ans;
    }

    vector<int> typ[2];
    typ[0].push_back(0);

    for(int i = 1; i <= 2; i++)
      	typ[ use_machine(vector<int>{0, i}) ].push_back(i);

    int B = 0;
    if(int(typ[1].size()) >= 2) B = 1;

    int maxV = 0;

    for(int i = 3; i+1 <= min(n-1, X); i += 2)
    {
        int U = use_machine(vector<int>{typ[B][0], i, typ[B][1], i+1});

        if(B == 0)
        {
          	typ[U/2].push_back(i);
            typ[U%2].push_back(i+1);
		}
        else
        {
          typ[!(U/2)].push_back(i);
          typ[!(U%2)].push_back(i+1);
        }

        maxV = i+1;
    }

    vector<int> ans{(int)typ[0].size(), (int)typ[1].size()};

    int base = (int)typ[0].size() > (int)typ[1].size() ? 0 : 1;
    int ct = (int)typ[base].size();

    // cerr << ans[0] << ' ' << ans[1] << '\n';

    for(int v = 1+maxV; v < n; v += ct-1)
    {
        // cerr << "V = " << v << '\n';
        vector<int> query{typ[base][0]};
        for(int i = v; i < v+ct-1 && i < n; i++)
        {
            query.push_back(i);
            query.push_back(typ[base][i-v+1]);
        }

        int Q = use_machine(query);
        int rem = (int)query.size() - 1  -  Q;

        ans[base] += rem/2;
        ans[!base] += Q/2;
    }
    return ans[0];
}

Subtask #1
79.5775 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB Output is correct
2 Correct 1 ms 200 KB Output is correct
3 Correct 1 ms 200 KB Output is correct
4 Correct 1 ms 200 KB Output is correct
5 Correct 2 ms 200 KB Output is correct
6 Correct 4 ms 300 KB Output is correct
7 Correct 6 ms 296 KB Output is correct
8 Correct 5 ms 300 KB Output is correct
9 Correct 6 ms 200 KB Output is correct
10 Partially correct 6 ms 200 KB Output is partially correct
11 Partially correct 10 ms 328 KB Output is partially correct
12 Partially correct 7 ms 200 KB Output is partially correct
13 Correct 4 ms 304 KB Output is correct
14 Correct 4 ms 200 KB Output is correct
15 Partially correct 7 ms 200 KB Output is partially correct
16 Partially correct 7 ms 200 KB Output is partially correct
17 Correct 3 ms 300 KB Output is correct
18 Correct 5 ms 200 KB Output is correct
19 Partially correct 7 ms 200 KB Output is partially correct
20 Partially correct 7 ms 216 KB Output is partially correct
21 Partially correct 7 ms 200 KB Output is partially correct
22 Partially correct 6 ms 200 KB Output is partially correct
23 Partially correct 6 ms 200 KB Output is partially correct
24 Correct 4 ms 200 KB Output is correct
25 Partially correct 6 ms 200 KB Output is partially correct
26 Partially correct 8 ms 200 KB Output is partially correct
27 Partially correct 6 ms 200 KB Output is partially correct
28 Partially correct 6 ms 200 KB Output is partially correct
29 Partially correct 6 ms 296 KB Output is partially correct
30 Partially correct 8 ms 200 KB Output is partially correct
31 Partially correct 6 ms 200 KB Output is partially correct
32 Partially correct 6 ms 200 KB Output is partially correct
33 Partially correct 9 ms 328 KB Output is partially correct
34 Partially correct 6 ms 200 KB Output is partially correct
35 Partially correct 8 ms 200 KB Output is partially correct
36 Partially correct 7 ms 296 KB Output is partially correct
37 Partially correct 8 ms 200 KB Output is partially correct
38 Partially correct 7 ms 200 KB Output is partially correct
39 Partially correct 7 ms 200 KB Output is partially correct
40 Partially correct 6 ms 200 KB Output is partially correct
41 Partially correct 7 ms 200 KB Output is partially correct
42 Partially correct 7 ms 200 KB Output is partially correct
43 Partially correct 10 ms 200 KB Output is partially correct
44 Partially correct 6 ms 200 KB Output is partially correct
45 Partially correct 7 ms 200 KB Output is partially correct
46 Partially correct 7 ms 300 KB Output is partially correct
47 Partially correct 8 ms 200 KB Output is partially correct
48 Partially correct 7 ms 200 KB Output is partially correct
49 Partially correct 8 ms 200 KB Output is partially correct
50 Partially correct 7 ms 200 KB Output is partially correct
51 Partially correct 10 ms 200 KB Output is partially correct
52 Partially correct 7 ms 200 KB Output is partially correct
53 Partially correct 8 ms 200 KB Output is partially correct
54 Partially correct 6 ms 200 KB Output is partially correct
55 Partially correct 9 ms 200 KB Output is partially correct
56 Partially correct 7 ms 200 KB Output is partially correct
57 Partially correct 8 ms 200 KB Output is partially correct
58 Partially correct 8 ms 200 KB Output is partially correct
59 Partially correct 6 ms 304 KB Output is partially correct
60 Partially correct 7 ms 200 KB Output is partially correct
61 Partially correct 7 ms 200 KB Output is partially correct
62 Correct 1 ms 200 KB Output is correct
63 Correct 0 ms 200 KB Output is correct
64 Correct 1 ms 200 KB Output is correct
65 Correct 1 ms 200 KB Output is correct
66 Correct 0 ms 200 KB Output is correct
67 Correct 0 ms 200 KB Output is correct
68 Correct 0 ms 200 KB Output is correct
69 Correct 1 ms 200 KB Output is correct
70 Correct 1 ms 200 KB Output is correct
71 Correct 1 ms 200 KB Output is correct
72 Correct 1 ms 200 KB Output is correct
73 Correct 0 ms 200 KB Output is correct
74 Correct 0 ms 200 KB Output is correct
75 Correct 0 ms 200 KB Output is correct
76 Correct 0 ms 200 KB Output is correct
77 Correct 0 ms 200 KB Output is correct
78 Correct 0 ms 200 KB Output is correct
79 Correct 1 ms 200 KB Output is correct
80 Correct 0 ms 200 KB Output is correct
81 Correct 0 ms 200 KB Output is correct
82 Correct 0 ms 200 KB Output is correct
83 Correct 1 ms 200 KB Output is correct
84 Correct 0 ms 200 KB Output is correct
85 Correct 0 ms 200 KB Output is correct
86 Correct 0 ms 200 KB Output is correct
87 Correct 0 ms 200 KB Output is correct
88 Correct 0 ms 200 KB Output is correct
89 Correct 0 ms 200 KB Output is correct
90 Correct 0 ms 200 KB Output is correct
91 Correct 1 ms 200 KB Output is correct