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Submission #1037251

# Submission time Handle Problem Language Result Execution time Memory
1037251 2024-07-28T11:37:19 Z Zicrus Counting Mushrooms (IOI20_mushrooms) C++17
0 / 100
 7 ms 888 KB 
#include <bits/stdc++.h>
#include "mushrooms.h"
using namespace std;
 
typedef long long ll;
 
int count_mushrooms(int n) {
    vector<int> G(n);
    for (int i = 0; i < n; i++) G[i] = i;
    mt19937 mt(time(0));
    shuffle(G.begin()+1, G.end(), mt);

    vector<ll> kCnt = {1, 0};
    vector<vector<ll>> known(2);
    known[0].push_back(G[0]);
    ll t = use_machine({G[0], G[1]});
    known[t].push_back(G[1]);
    kCnt[t]++;
    if (t == 1) {
        t = use_machine({G[0], G[2]});
        known[t].push_back(G[2]);
        kCnt[t]++;
    }
    while (kCnt[0] + kCnt[1] < n) {
        ll sumK = kCnt[0] + kCnt[1];
        ll kVal = known[0].size() > known[1].size() ? 0 : 1;
        vector<ll> kMost = kVal ? known[1] : known[0];
        vector<int> tst;
        ll id = sumK;
        ll nw2Cnt = -1;
        for (int i = 0; i < kMost.size() && id < n; i++) {
            tst.push_back(G[id++]);
            tst.push_back(kMost[i]);
            nw2Cnt++;
        }
        t = use_machine(tst);
        ll nwK = (t & 1) ^ kVal;
        known[nwK].push_back(G[sumK]);
        kCnt[nwK]++;
        kCnt[1-kVal] += t/2;
        kCnt[kVal] += nw2Cnt - t/2;
    }
    return kCnt[0];
}

Compilation message

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:31:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |         for (int i = 0; i < kMost.size() && id < n; i++) {
      |                         ~~^~~~~~~~~~~~~~

Subtask #1
0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 3 ms 600 KB Output is correct
8 Correct 4 ms 600 KB Output is correct
9 Correct 4 ms 344 KB Output is correct
10 Partially correct 4 ms 600 KB Output is partially correct
11 Partially correct 4 ms 600 KB Output is partially correct
12 Partially correct 4 ms 576 KB Output is partially correct
13 Correct 4 ms 344 KB Output is correct
14 Correct 2 ms 772 KB Output is correct
15 Partially correct 4 ms 600 KB Output is partially correct
16 Partially correct 4 ms 600 KB Output is partially correct
17 Correct 3 ms 344 KB Output is correct
18 Correct 4 ms 600 KB Output is correct
19 Partially correct 4 ms 600 KB Output is partially correct
20 Partially correct 6 ms 568 KB Output is partially correct
21 Partially correct 4 ms 600 KB Output is partially correct
22 Partially correct 5 ms 600 KB Output is partially correct
23 Correct 4 ms 600 KB Output is correct
24 Correct 2 ms 500 KB Output is correct
25 Partially correct 4 ms 552 KB Output is partially correct
26 Partially correct 4 ms 600 KB Output is partially correct
27 Partially correct 4 ms 544 KB Output is partially correct
28 Partially correct 4 ms 600 KB Output is partially correct
29 Partially correct 4 ms 580 KB Output is partially correct
30 Partially correct 4 ms 600 KB Output is partially correct
31 Partially correct 5 ms 600 KB Output is partially correct
32 Partially correct 4 ms 524 KB Output is partially correct
33 Partially correct 4 ms 572 KB Output is partially correct
34 Partially correct 4 ms 572 KB Output is partially correct
35 Partially correct 5 ms 592 KB Output is partially correct
36 Partially correct 4 ms 596 KB Output is partially correct
37 Partially correct 4 ms 600 KB Output is partially correct
38 Partially correct 4 ms 600 KB Output is partially correct
39 Partially correct 5 ms 596 KB Output is partially correct
40 Partially correct 4 ms 540 KB Output is partially correct
41 Partially correct 7 ms 612 KB Output is partially correct
42 Partially correct 4 ms 600 KB Output is partially correct
43 Partially correct 7 ms 580 KB Output is partially correct
44 Partially correct 4 ms 608 KB Output is partially correct
45 Partially correct 4 ms 624 KB Output is partially correct
46 Partially correct 4 ms 584 KB Output is partially correct
47 Partially correct 4 ms 600 KB Output is partially correct
48 Partially correct 5 ms 344 KB Output is partially correct
49 Partially correct 5 ms 888 KB Output is partially correct
50 Partially correct 4 ms 600 KB Output is partially correct
51 Partially correct 4 ms 600 KB Output is partially correct
52 Partially correct 4 ms 600 KB Output is partially correct
53 Partially correct 5 ms 784 KB Output is partially correct
54 Partially correct 5 ms 600 KB Output is partially correct
55 Partially correct 4 ms 344 KB Output is partially correct
56 Partially correct 4 ms 600 KB Output is partially correct
57 Partially correct 4 ms 344 KB Output is partially correct
58 Partially correct 7 ms 600 KB Output is partially correct
59 Partially correct 5 ms 592 KB Output is partially correct
60 Partially correct 4 ms 544 KB Output is partially correct
61 Partially correct 5 ms 788 KB Output is partially correct
62 Correct 0 ms 344 KB Output is correct
63 Incorrect 0 ms 344 KB Duplicate value 0 in the query array.
64 Halted 0 ms 0 KB -