oj.uz

Submission #306457

# Submission time Handle Problem Language Result Execution time Memory
306457 2020-09-25T15:30:26 Z SorahISA Counting Mushrooms (IOI20_mushrooms) C++17
91.8699 / 100
 11 ms 388 KB 
#include "mushrooms.h"
#include <bits/stdc++.h>
using namespace std;

using pii = pair<int, int>;
template<typename T>
using Prior = priority_queue<T>;
template<typename T>
using prior = priority_queue<T, vector<T>, greater<T>>;

#define X first
#define Y second
#define ALL(x) (x).begin(), (x).end()
#define eb emplace_back
#define pb push_back

int count_mushrooms(int n) {
    const int B = (int)floor(sqrt(2.1 * n + 0.5));
    vector<int> m{0};
    
    // cout << "Block size = " << B << "\n";
    
    if (n <= 227) {
        for (int i = 1; i < n; ++i) {
            m.eb(m.back() ^ use_machine({i-1, i}));
        }
        return n - accumulate(ALL(m), 0);
    }
    
    vector<int> tA{0}, tB;
    m.eb(m.back() ^ use_machine({0, 1}));
    m.back() ? tB.eb(1) : tA.eb(1);
    m.eb(m.back() ^ use_machine({1, 2}));
    m.back() ? tB.eb(2) : tA.eb(2);
    
    for (int i = 3; i < B; i += 2) {
        if (tA.size() >= 2) {
            int ret = use_machine({tA[0], i, tA[1], i + 1});
            ret & 2 ? tB.eb(i) : tA.eb(i);
            ret & 1 ? tB.eb(i + 1) : tA.eb(i + 1);
        }
        else {
            int ret = use_machine({tB[0], i, tB[1], i + 1});
            ret & 2 ? tA.eb(i) : tB.eb(i);
            ret & 1 ? tA.eb(i + 1) : tB.eb(i + 1);
        }
    }
    
    // cout << "tA : "; for (auto x : tA) cout << x << " "; cout << "\n";
    // cout << "tB : "; for (auto x : tB) cout << x << " "; cout << "\n";
    
    int ans = tA.size(), tok = B | 1;
    
    while (tok < n) {
        if (tA.size() >= tB.size()) {
            /// 0 x 0 x 0 x 0 ... 0 x 0 x ///
            int sz = tA.size();
            vector<int> tmp;
            for (int i = 0; i < sz and tok < n; ++i) {
                tmp.eb(tA[i]), tmp.eb(tok++);
            }
            int ret = use_machine(tmp);
            ans += tmp.size() / 2 - (ret + 1) / 2;
            if (~ret & 1) tA.eb(tok - 1);
            else          tB.eb(tok - 1);
        }
        else if (tB.size() > tA.size()) {
            /// 1 x 1 x 1 x 1 ... 1 x 1 x ///
            int sz = tB.size();
            vector<int> tmp;
            for (int i = 0; i < sz and tok < n; ++i) {
                tmp.eb(tB[i]), tmp.eb(tok++);
            }
            int ret = use_machine(tmp);
            ans += (ret + 1) / 2;
            if (ret & 1) tA.eb(tok - 1);
            else         tB.eb(tok - 1);
        }
    }
    
    return ans;
}

Subtask #1
91.8699 / 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 1 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 7 ms 376 KB Output is correct
8 Correct 7 ms 384 KB Output is correct
9 Correct 8 ms 384 KB Output is correct
10 Correct 8 ms 256 KB Output is correct
11 Partially correct 9 ms 256 KB Output is partially correct
12 Correct 7 ms 256 KB Output is correct
13 Correct 8 ms 384 KB Output is correct
14 Correct 4 ms 372 KB Output is correct
15 Partially correct 9 ms 256 KB Output is partially correct
16 Partially correct 9 ms 256 KB Output is partially correct
17 Correct 4 ms 256 KB Output is correct
18 Correct 6 ms 256 KB Output is correct
19 Partially correct 7 ms 256 KB Output is partially correct
20 Correct 8 ms 384 KB Output is correct
21 Correct 11 ms 256 KB Output is correct
22 Partially correct 8 ms 384 KB Output is partially correct
23 Correct 7 ms 384 KB Output is correct
24 Correct 6 ms 256 KB Output is correct
25 Partially correct 8 ms 256 KB Output is partially correct
26 Partially correct 8 ms 376 KB Output is partially correct
27 Partially correct 7 ms 256 KB Output is partially correct
28 Partially correct 7 ms 256 KB Output is partially correct
29 Partially correct 7 ms 256 KB Output is partially correct
30 Partially correct 8 ms 384 KB Output is partially correct
31 Partially correct 7 ms 256 KB Output is partially correct
32 Partially correct 8 ms 384 KB Output is partially correct
33 Partially correct 6 ms 388 KB Output is partially correct
34 Partially correct 7 ms 384 KB Output is partially correct
35 Partially correct 7 ms 256 KB Output is partially correct
36 Partially correct 7 ms 256 KB Output is partially correct
37 Partially correct 7 ms 256 KB Output is partially correct
38 Partially correct 6 ms 380 KB Output is partially correct
39 Partially correct 7 ms 384 KB Output is partially correct
40 Partially correct 7 ms 384 KB Output is partially correct
41 Partially correct 9 ms 384 KB Output is partially correct
42 Partially correct 7 ms 256 KB Output is partially correct
43 Partially correct 9 ms 256 KB Output is partially correct
44 Partially correct 8 ms 256 KB Output is partially correct
45 Partially correct 8 ms 256 KB Output is partially correct
46 Partially correct 10 ms 384 KB Output is partially correct
47 Partially correct 8 ms 256 KB Output is partially correct
48 Partially correct 7 ms 256 KB Output is partially correct
49 Partially correct 7 ms 256 KB Output is partially correct
50 Partially correct 8 ms 256 KB Output is partially correct
51 Partially correct 7 ms 256 KB Output is partially correct
52 Partially correct 7 ms 256 KB Output is partially correct
53 Partially correct 7 ms 384 KB Output is partially correct
54 Partially correct 7 ms 256 KB Output is partially correct
55 Partially correct 9 ms 384 KB Output is partially correct
56 Partially correct 8 ms 256 KB Output is partially correct
57 Partially correct 7 ms 256 KB Output is partially correct
58 Partially correct 7 ms 384 KB Output is partially correct
59 Partially correct 7 ms 256 KB Output is partially correct
60 Partially correct 7 ms 256 KB Output is partially correct
61 Partially correct 7 ms 256 KB Output is partially correct
62 Correct 1 ms 256 KB Output is correct
63 Correct 0 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 0 ms 256 KB Output is correct
69 Correct 0 ms 256 KB Output is correct
70 Correct 1 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 0 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 1 ms 256 KB Output is correct
81 Correct 1 ms 256 KB Output is correct
82 Correct 1 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 1 ms 256 KB Output is correct
86 Correct 1 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 1 ms 256 KB Output is correct