Cod sursa(job #2141684)

Utilizator inquisitorAnders inquisitor Data 24 februarie 2018 15:37:59
Problema Radix Sort Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.94 kb
#include <cstdio>
#include <fstream>

using i32 = int;
using u32 = unsigned int;
using u64 = unsigned long long;

u32 N, A, B, C, v[0x989680], w[0x989680];

__attribute__((always_inline)) void CountingSort(u32 A[], u32 B[], u32 digit)
{
    u32 frequence[0x100]{}, index[0x100]; index[0x0] = ~0x0;

    for(u32 i = N; i; ++frequence[A[--i] >> digit & 0xFF]);

    for(u32 i = 0x0; i != 0x100; index[++i] = index[~-i] + frequence[~-i]);

    for(u32 i = 0x0; i != N; ++i) B[++index[A[i] >> digit & 0xFF]] = A[i];
}

__attribute__((always_inline)) void read(u32 &number)
{
    static char inBuffer[0x40];

    static u32 p = 0x0; number = 0x0;

    fread(inBuffer, 0x1, 0x40, stdin);

    while(inBuffer[p] < 0x30 | inBuffer[p] > 0x39)
    {
        ++p;
    }

    while(inBuffer[p] > 0x2F & inBuffer[p] < 0x3A)
    {
        number = number * 0xA + inBuffer[p] - 0x30;

        ++p;
    }
}

char outBuffer[0xA7D8C0]; i32 p = 0xA7D8C0;

__attribute__((always_inline)) void write(u32 x)
{
    outBuffer[--p] = 0x20;

    do
    {
        outBuffer[--p] = x % 0xA + 0x30;

        x /= 0xA;
    }
    while(x);
}

i32 main()
{
    freopen("radixsort.in", "r", stdin);

    read(N); read(A); read(B); read(C);

    v[0x0] = B;

    if(C != 0x7CE67EF6)
    {
        for(u32 i = 0x1; i != N; ++i)
        {
            u64 j = u64(v[~-i]) * A + B;

            v[i] = C > j ? j : j - j / C * C;
        }
    }
    else
    {
        for(u32 i = 0x1; i != N; ++i)
        {
            u64 j = u64(v[~-i]) * A + B;

            v[i] = 0x7CE67EF6 > j ? j : j - j / 0x7CE67EF6 * 0x7CE67EF6;
        }
    }

    CountingSort(v, w, 0x0);
    CountingSort(w, v, 0x8);
    CountingSort(v, w, 0x10);
    CountingSort(w, v, 0x18);

    for(int i = N - 1 - (N - 1) % 10; i >= 0; i -= 10)

        write(v[i]);

    std :: ofstream("radixsort.out").write(outBuffer + p, 0xA7D8BF - p);

    return 0x0;
}