Cod sursa(job #2142986)

Utilizator inquisitorAnders inquisitor Data 25 februarie 2018 14:11:19
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.64 kb
#include <cstdio>
#pragma GCC optimize("O1")

unsigned int N, v[0x7A120], w[0x7A120];

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

    while(i) ++frequence[A[--i] >> digit & 0xFF];

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

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

__attribute__((always_inline)) void read(unsigned int &num)
{
    static char inBuffer[0x8000];

    static unsigned int p = 0x0; num = 0x0;

    while(inBuffer[p] < 0x30 | inBuffer[p] > 0x39)
    {
        ++p != 0x8000 || (fread(inBuffer, 0x1, 0x8000, stdin), p = 0x0);
    }

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

        ++p != 0x8000 || (fread(inBuffer, 0x1, 0x8000, stdin), p = 0x0);
    }
}

#define SIZE 0x4C4B40

char outBuffer[SIZE]; unsigned int p = SIZE;

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

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

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

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

    read(N);

    for(unsigned int i = 0x0; i != N; ++i)
    {
        read(v[i]);
    }

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

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

    do
    {
        write(v[--N]);
    }
    while(N);

    fwrite(outBuffer + p, 0x1, ~-SIZE - p, stdout);

    return 0x0;
}