Cod sursa(job #2429767)

Utilizator alex.cojocaruAlex Cojocaru alex.cojocaru Data 11 iunie 2019 08:57:04
Problema Radix Sort Scor 100
Compilator cpp-32 Status done
Runda Arhiva educationala Marime 1.14 kb
#include <iostream>

#define NMAX 10000000
#define BITMAX 31
#define BITS 16
#define VALMAX (1 << BITS)

using namespace std;

unsigned int v [ NMAX ] ;
unsigned int vc [ NMAX ] ; /// tinem indicii
int f [ VALMAX + 1 ] ;
int mask = ((1 << BITS) - 1 ) ;

FILE *fin, *fout ;

inline void sortbybit (int n, int bt ) {
  int byte, i, put ;
  for (i = 0 ; i < VALMAX ; ++i )
    f[i] = 0 ;
  put = bt * BITS ;
  for (i = 1 ; i <= n ; ++i ) {
    byte = ( ( v[i] >> put ) & mask ) ;
    f[byte+1]++;
  }
  for (i = 1 ; i < VALMAX ; ++i )
    f[i] += f[i-1] ;
  for (i = 1 ; i <= n ; ++i ) {
    byte = ( ( v[i] >> put ) & mask ) ;
    vc[f[byte]+1] = v[i] ;
    f[byte]++;
  }
  for (i = 1 ; i <= n ; ++i )
    v[i] = vc[i] ;
}

int main() {
  fin = fopen ("radixsort.in", "r" ) ;
  fout = fopen ("radixsort.out", "w" ) ;
  int n, i, a, b, c ;
  fscanf (fin, "%d%d%d%d", &n, &a, &b, &c ) ;
  v[1] = b;
  for (i = 2 ; i <= n ; i++ )
    v[i] = (1LL * v[i-1] * a + b ) % c ;
  for (i = 0 ; i < (BITMAX+1) / BITS ; i++ )
    sortbybit (n, i) ;
  for (i = 1 ; i <= n ; i+=10)
    fprintf (fout, "%d ", v[i] ) ;
  return 0;
}