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Cod sursa(job #2220713)

Utilizator inquisitorAnders inquisitor Data 12 iulie 2018 13:28:14
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.92 kb
#include <cstdio>
#include <string.h>

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

__attribute__((always_inline)) void CountingSort(int A[], int B[], int digit)
{
    int frequence[0x800]{}, index[0x800], i = N; index[0x0] = ~0x0;

    while(i) ++frequence[A[--i] >> digit & 0x7FF];

    for(; i != 0x7FF; index[++i] = index[~-i] + frequence[~-i]);

    for(i = 0x0; i != N; ++i) B[++index[A[i] >> digit & 0x7FF]] = A[i];
}

__attribute__((always_inline)) int get_nr()
{
    static char inBuffer[0x8000];

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

    while(inBuffer[p] < 48|| inBuffer[p] > 57)
    {
        ++p == 0x8000 && (fread(inBuffer, 0x1, 0x8000, stdin), p = 0x0);
    }

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

        ++p == 0x8000 && (fread(inBuffer, 0x1, 0x8000, stdin), p = 0x0);

        if(inBuffer[p] < 48 || inBuffer[p] > 57) break;
    }

    return num;
}

char outBuffer[5000000]; int p = -1;

__attribute__((always_inline)) void itoa(int x)
{
    int digits = x > 999999999 ? 11 :
                 x > 99999999  ? 10 :
                 x > 9999999   ?  9 :
                 x > 999999    ?  8 :
                 x > 99999     ?  7 :
                 x > 9999      ?  6 :
                 x > 999       ?  5 :
                 x > 99        ?  4 :
                 x > 9         ?  3 : 2;

    for(int i = digits; --i; x /= 10)
    {
        outBuffer[p + i] = x % 10 + 48;
    }

    p = p + digits;
}

int main()
{
    memset(outBuffer, 32, 4999999);

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

    N = get_nr();

    for(int i = N; --i;)
    {
        v[i] = get_nr();
    }

    v[0] = get_nr();

    CountingSort(v, w,  0);
    CountingSort(w, v, 11);
    CountingSort(v, w, 22);

    for(int i = 0; i != N; ++i)
    {
        itoa(w[i]);
    }

    fwrite(outBuffer, 1, p, stdout);

    return 0;
}