Cod sursa(job #2269498)

Utilizator pasoi_stefanPasoi Stefan pasoi_stefan Data 26 octombrie 2018 01:20:16
Problema Radix Sort Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.3 kb
#include <cstring>
#include <fstream>
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];
    for (int i = 0; i < TOTAL_BYTES; i ++) {
        if(i % 2 == 0)
            countsort(numbers, temp, 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] % c + b) % c;

}

void write(){

    for(int i = 0; i < n; i +=10)
        fout<<numbers[i]<<' ';
    fout<<'\n';

}

int main(){

    read();
    radixsort();
    write();

}