Submission #643086

#	Time	Username	Problem	Language	Result	Execution time	Memory
643086		cologne	Broken Device 2 (JOI22_device2)	C++17	13 / 100	546 ms	25840 KiB

Anna

#include "Anna.h"
#include <bits/stdc++.h>
using namespace std;

int Declare()
{
    return 2000;
}
namespace
{
    int count(int N)
    {
        if (N < 2)
            return 0;
        return 4 * (2 * N - 4 + 1);
    }

    pair<vector<int>, vector<int>> solve(int N, int A)
    {
        int v = N / 3;
        vector<int> L(N), R(N);
        if (A % 2 == 1)
            L[0] = R[0] = 1;
        A /= 2;
        if (A % 2 == 1)
            L.back() = R.back() = 1;
        A /= 2;
        for (int i = 0; i < A; i++)
        {
            if (i < N - 2)
                L[i + 1] = 1;
            else
                R[i - (N - 2) + 1] = 1;
        }
        return {L, R};
    }
}

pair<vector<int>, vector<int>> Anna(long long A)
{
    --A;
    for (int i = 1; i <= 2000; i++)
    {
        long long K = count(i);
        if (A >= K)
            A -= K;
        else
            return solve(i, A);
    }
    assert(false);
}

Bruno

#include "Bruno.h"
#include <bits/stdc++.h>
using namespace std;
namespace
{
    int count(int N)
    {
        if (N < 2)
            return 0;
        return 4 * (2 * N - 4 + 1);
    }

    long long solve(vector<int> u)
    {
        int N = u.size() / 2;
        int L = u[0], R = u.back();
        int C = count(u.begin(), u.end(), 1) - 2 * L - 2 * R;
        return 4 * C + 2 * R + L;
    }
}
long long Bruno(vector<int> u)
{
    long long ans = 1;
    for (int i = 1; i < (int)u.size() / 2; i++)
        ans += count(i);

    return ans + solve(u);
}

Compilation message (stderr)

Anna.cpp: In function 'std::pair<std::vector<int>, std::vector<int> > {anonymous}::solve(int, int)':
Anna.cpp:20:13: warning: unused variable 'v' [-Wunused-variable]
   20 |         int v = N / 3;
      |             ^

Bruno.cpp: In function 'long long int {anonymous}::solve(std::vector<int>)':
Bruno.cpp:15:13: warning: unused variable 'N' [-Wunused-variable]
   15 |         int N = u.size() / 2;
      |             ^

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 3 / 3
• Subtask 4: 0 / 12
• Subtask 5: 0 / 15
• Subtask 6: 0 / 60