Cod sursa(job #2654195)

Utilizator raikadoCri Lu raikado Data 30 septembrie 2020 00:20:19
Problema Radix Sort Scor 70
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 2.01 kb
#define nume "radixsort"
	
 
	
#ifndef INFOARENA
	
#define fisier "../algorithm solutions/" nume
	
#define DBG
	
#else
	
#define fisier nume
	
#endif
	
 
	
#include <algorithm>
	
#include <cassert>
	
#include <cstring>
	
#include <fstream>
	
#include <iomanip>
	
#include <iostream>
	
#include <map>
	
#include <set>
	
#include <sstream>
	
#include <vector>
	
#ifdef INFOARENA
	
#include <tr1/unordered_set>
	
#include <tr1/unordered_map>
	
using namespace std::tr1;
	
#else
	
#include <unordered_set>
	
#include <unordered_map>
	
#endif
	
 
	
using namespace std;
	
 
	
ifstream fin(fisier".in");
	
ofstream fout(fisier".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] % c + b) % c;
	
}
	
void write(ofstream& f)
	
{
	
    for(int i = 0; i < n; i +=10)
	
        f << numbers[i]<< ' ';
	
    f<<endl;
	
}
	
 
	
int main()
	
{
	
    read();
	
    
	
    radixsort();
	
//    sort(numbers, numbers + n);
	
    
	
    write(fout);
	
    
	
    return 0;
	
}