Cod sursa(job #1653958)

Utilizator GinguIonutGinguIonut GinguIonut Data 16 martie 2016 18:38:19
Problema Radix Sort Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.09 kb
#include <fstream>
#include <string.h>

#define get_byte(x) ((x >> (byte*8))&RADIX)
#define RADIX_SIZE 8
#define RADIX 0xFF
#define nMax 10000005
using namespace std;
ifstream fin("radixsort.in");
ofstream fout("radixsort.out");
int n, a, b, c, v[nMax], temp[nMax];
void read()
{
    fin>>n>>a>>b>>c;
    v[0]=b%c;
    for(int i=1;i<n;i++)
        v[i]=(1ll*a*v[i-1]%c+b)%c;
}
void counting_sort(int A[], int B[], int byte)
{
    int counter[1 << RADIX_SIZE];
    int index[1 << RADIX_SIZE];

    memset(counter, 0, sizeof(counter));

    for(int i=0;i<n;i++)
        counter[get_byte(A[i])]++;

    index[0]=0;
    for(int i=1;i<(1 << RADIX_SIZE);i++)
        index[i]=index[i-1]+counter[i-1];

    for(int i=0;i<n;i++)
        B[index[get_byte(A[i])]++]=A[i];
}
void radix_sort()
{
    for(int i=0;i<4;i++)
        if(i%2==0)
            counting_sort(v, temp, i);
        else
            counting_sort(temp, v, i);
}
void write()
{
    for(int i=0;i<n;i+=10)
        fout<<v[i]<<" ";
}
int main()
{
    read();
    radix_sort();
    write();
    return 0;
}