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Submission #1032574

# Submission time Handle Problem Language Result Execution time Memory
1032574 2024-07-24T03:08:54 Z sleepntsheep Counting Mushrooms (IOI20_mushrooms) C++17
0 / 100
 1 ms 344 KB 
#include "mushrooms.h"

int count_mushrooms(int n) {
    if (n <= 227) {
        int count = 1, cur = 0;
        for (int i = 1; i < n; ++i) {
            if (use_machine({i - 1, i})) {
                cur ^= 1;
            }
            count += !cur;
        }
        return count;
    }

	std::vector<int> A = {0}, B;
    int count = 1;

    int X = 100;

	for (int cur = 0, i = 1; i < X; i++) {
        int y = use_machine({i-1, i});
        cur ^= y;
        if (cur == 0)
            ++count, A.push_back(cur);
        else
            B.push_back(cur);
    }

    int amogus = std::max(A.size(), B.size());
    int chosen = A.size() >= B.size() ? 0 : 1;

    int l = X;
    while (l < n) {
        int r = std::min(n, l + amogus - 1) - 1;

        std::vector<int> m;

        if (0 == chosen) {
            m = {A[0]};
            for (int j = l, k = 1; j <= r; ++j, ++k) {
                m.push_back(j);
                m.push_back(A[k]);
            }
            count += (r - l + 1) - use_machine(m) / 2;
        } else {
            m = {B[0]};
            for (int j = l, k = 1; j <= r; ++j, ++k) {
                m.push_back(j);
                m.push_back(B[k]);
            }
            count += use_machine(m) / 2;
        }

        l = r + 1;
    }


	return count;
}

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 Incorrect 1 ms 344 KB Duplicate value 0 in the query array.
7 Halted 0 ms 0 KB -