Cod sursa(job #2221422)

Utilizator inquisitorAnders inquisitor Data 14 iulie 2018 11:15:08
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.96 kb
#include <cstdio>
#define uint32_t size_t

__attribute__((always_inline)) void integer_sort(size_t N, size_t *A, size_t *B)
{
    for(size_t shift = 0, *t; shift <= 22; shift += 11, t = A, A = B, B = t)
    {
        size_t frequence[2048]{};

        for(size_t i = N; i;) --i, ++frequence[A[i] >> shift & 2047];

        for(size_t i = 2047; i;) --i, frequence[i] += frequence[i + 1];

        for(size_t i = N; i;) --i, B[--frequence[A[i] >> shift & 2047]] = A[i];
    }
}

__attribute__((always_inline)) size_t get_number()
{
    static char inBuffer[0x20000];

    static size_t p = 0x1FFFF; size_t number = 0x0;

    inBuffer[p] > 0x2F || ++p != 0x20000 || (fread(inBuffer, 0x1, 0x20000, stdin), p = 0x0);

    for(; inBuffer[p] > 0x2F;)
    {
        number = number * 0xA + inBuffer[p] - 0x30;

        ++p != 0x20000 || (fread(inBuffer, 0x1, 0x20000, stdin), p = 0x0);
    }

    return number;
}

char outBuffer[0x4C4B40]; size_t p = ~0x0;

__attribute__((always_inline)) void put_number(size_t x)
{
    size_t digits = x > 0x3B9AC9FF ? 0xB :
                    x > 0x5F5E0FF  ? 0xA :
                    x > 0x98967F   ? 0x9 :
                    x > 0xF423F    ? 0x8 :
                    x > 0x1869F    ? 0x7 :
                    x > 0x270F     ? 0x6 :
                    x > 0x3E7      ? 0x5 :
                    x > 0x63       ? 0x4 :
                    x > 0x9        ? 0x3 : 0x2;

    for(size_t i = digits; --i; x /= 0xA)
    {
        outBuffer[p + i] = x % 0xA + 0x30;
    }

    outBuffer[p = p + digits] = 0x20;
}

int main()
{
    freopen("algsort.in", "r", stdin);
    freopen("algsort.out", "w", stdout);

    size_t N, v[0x80000], w[0x80000];

    N = get_number();

    for(size_t i = N; i;)
    {
        --i; v[i] = get_number();
    }

    integer_sort(N, v, w);

    for(size_t i = N; i;)
    {
        --i; put_number(w[i]);
    }

    fwrite(outBuffer, 0x1, p, stdout);

    return 0x0;
}