Cod sursa(job #2275852)

Utilizator cezar.plescaCezar Plesca cezar.plesca Data 3 noiembrie 2018 18:00:59
Problema Radix Sort Scor 30
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.31 kb
#include <cstring>
#include <fstream>
#include <iostream>
 
using namespace std;
 
ifstream fin("radixsort.in");
ofstream fout("radixsort.out");
 
#define MAX_N 10000001
#define RADIX 0xFF
#define RADIX_SIZE 8
#define TOTAL_BYTES sizeof(V[0])
 
int n;
int V[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(V, temp, i);// sortez dupa byte-ul i
        else
            countsort(temp, V, i);
    }
}
 
int main()
{
    int a,b,c;
    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;
    
    radixsort();
    
    for(int i = 0; i < n; i +=10)
        fout << V[i]<< ' ';
    
    return 0;
}