Cod sursa(job #1380275)

Utilizator PTAdrian64Pop-Tifrea Adrian PTAdrian64 Data 7 martie 2015 07:20:48
Problema Radix Sort Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.16 kb
#include <fstream>
#define nmax 10000001
#include <cstring>
#define TOTAL_BYTES sizeof(numbers[0])

using namespace std;

ifstream fin("apm.in");
ofstream fout("apm.out");

int numbers[nmax];
int n;
#define RADIX 0xFF
#define get_byte(x) ((x>>(byte * 8))&RADIX)

void read(){
    int a,b,c;
    fin>>n>>a>>b>>c;
    numbers[0] = b%c;
    for(int i = 1;i < n;i++)
        numbers[i] = (1LL*a*numbers[i-1]%c + b)%c;
}
void countersort(int A[],int B[],int byte){
    int counter[1<<8];
    int index[1<<8];
    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<<8;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 radixsort(){
    int *temp = new int[n];
    for(int i = 0;i < TOTAL_BYTES;i++){
        if(i%2 == 0)
            countersort(numbers,temp,i);
        else
           countersort(temp,numbers,i);
    }
}
void print(){
    for(int i = 0;i < n;i += 10)
        fout<<numbers[i]<<' ';
    fout<<"\n";
}


int main(){
    read();
    radixsort();
    print();
        return 0;
}