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Submission #784662

# Submission time Handle Problem Language Result Execution time Memory
784662 2023-07-16T11:42:45 Z boris_mihov Abracadabra (CEOI22_abracadabra) C++17
0 / 100
 3000 ms 34068 KB 
#include <algorithm>
#include <iostream>
#include <numeric>
#include <cassert>
#include <cstring>
#include <vector>
#include <cmath>
#include <stack>

typedef long long llong;
const int MAXN = 200000 + 10;
const int MAXQ = 1000000 + 10;
const llong INF = 1e18;
const int INTINF = 1e9;

int n, q;
int total;
int a[MAXN];
int b[MAXN];
int output[MAXQ];
std::vector <std::pair <int,int>> v[MAXN];

void riffle()
{
    int curr = 0;
    int pos = 1;
    int lPtr = 1, rPtr = n / 2 + 1;
    while (lPtr < n / 2 + 1 || rPtr < n + 1)
    {
        if (lPtr == n / 2 + 1)
        {
            b[pos++] = a[rPtr++];
            curr = std::max(curr, pos);
            continue;
        }

        if (rPtr == n + 1)
        {
            b[pos++] = a[lPtr++];
            continue;
        }

        if (a[lPtr] < a[rPtr])
        {
            b[pos++] = a[lPtr++];
        } else
        {
            b[pos++] = a[rPtr++];
            curr = std::max(curr, pos);
        }
    }
    
    for (int i = 1 ; i <= n ; ++i)
    {
        a[i] = b[i];
    }

    if (curr > 2 * sqrt(n))
    {
        total++;
    }
}

void solve()
{
    int bucketSize = sqrt(n) + 5;
    for (int i = 0 ; i <= bucketSize ; ++i)
    {
        for (const auto &[pos, idx] : v[i])
        {
            output[idx] = a[pos];
        }

        riffle();
    }

    total = 0;
    for (int i = bucketSize + 1 ; i <= n ; ++i)
    {
        for (const auto &[pos, idx] : v[i])
        {
            output[idx] = a[pos];
        }

        riffle();
    }

    assert(total <= 2 * bucketSize);
}

void print()
{
    for (int i = 1 ; i <= q ; ++i)
    {
        std::cout << output[i] << '\n';
    }
}

void input()
{
    std::cin >> n >> q;
    for (int i = 1 ; i <= n ; ++i)
    {
        std::cin >> a[i];
    }

    for (int i = 1 ; i <= q ; ++i)
    {
        int t, idx;
        std::cin >> t >> idx;
        v[std::min(t, (int)sqrt(n))].push_back({idx, i});
    }
}

void fastIOI()
{
    std::ios_base :: sync_with_stdio(0);
    std::cout.tie(nullptr);
    std::cin.tie(nullptr);
}

int main()
{
    fastIOI();
    input();
    solve();
    print();

    return 0;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 123 ms 34068 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3050 ms 18444 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3050 ms 7072 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 25.0

# Verdict Execution time Memory Grader output
1 Runtime error 123 ms 34068 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -