Cod sursa(job #2829411)

Utilizator BeilandArnoldArnold Beiland BeilandArnold Data 8 ianuarie 2022 16:28:29
Problema Radix Sort Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.36 kb
#include <fstream>
#include <cstdlib>
#include <cstring>

using namespace std;

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


#define MAX_N 10000000 + 1
#define RADIX 0xFF
#define RADIX_SIZE 8
#define TOTAL_BYTES sizeof(numbers[0])

int n;

int numbers[MAX_N];



#define get_byte(x) ((x>>(byte * 8))&RADIX)


void countsort(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 radixsort() {

    int *temp = new int[n]; // avem nevoie de un array ca spatiu temporar

    for (int i = 0; i < TOTAL_BYTES; i ++) {

        if(i % 2 == 0)

            countsort(numbers, temp, i);// sortez dupa byte-ul i

        else

            countsort(temp, numbers, i);

    }

}

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] + b) % c;
}

void write(ofstream& f)
{
    for(int i = 0; i < n; i +=10)
        f << numbers[i]<< ' ';
    f<<endl;
}

int main()
{
    read();
    radixsort();
    write(fout);
    return 0;
}