Cod sursa(job #1846286)

Utilizator triscacezarTrisca Vicol Cezar triscacezar Data 12 ianuarie 2017 15:15:19
Problema Radix Sort Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.19 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;

ifstream f("radixsort.in");
ofstream g("radixsort.out");

int n;
int numbers[MAX_N];
void read();
void countsort(int,int,int);
void radixsort();
int main()
{
    read();
    radixsort();
    for(int i=0;i<n;i+=10)
        g<<numbers[i]<<' ';
    return 0;
}
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;
    f>>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;
}