Cod sursa(job #2625120)

Utilizator UrsaWarlordFrincu Madalin Gabriel UrsaWarlord Data 5 iunie 2020 18:57:42
Problema Radix Sort Scor 70
Compilator cpp-32 Status done
Runda Arhiva educationala Marime 1.38 kb
#include <bits/stdc++.h>
#define MAX_N 10000000 + 1
#define RADIX 0xFF
#define RADIX_SIZE 8
#define TOTAL_BYTES sizeof(numbers[0])
#define get_byte(x) ((x>>(byte * 8))&RADIX)
using namespace std;

int n;
int numbers[MAX_N];
ifstream fin("radixsort.in");
ofstream fout("radixsort.out");


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] % c + 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;
}