#include <stdio.h>
#include <unistd.h>
#include <math.h>

#define SIZE	(8)

/* N-1 次多項式補間フロントエンド */

int main( int argc, char **argv )
{
  double c, x, y;
  int	 n, i, j, k;
  char   copyright[] = "Written by M.Takata: 2011/05/24\n";
  int    ch, verbose=0, query=1;
  
  verbose = 0;
  while (( ch = getopt(argc,argv,"+vhn:")) != -1 ) {
    if ( ch == 'v' ) verbose = 1;
    if ( ch == 'h' ) {
      fprintf( stderr, "Options:\n" );
      fprintf( stderr, "\t-v: dumps intermediate results.\n" );
      fprintf( stderr, "\t-h: shows help message, as you see now.\n" );
      fprintf( stderr, "\t-n N: shows # of coeff. of a polynomial fitted.\n" );
      fprintf( stderr, "\n" );
      return 1;
    }
    if ( ch == 'n' ) {
      query = 0; sscanf( optarg, "%d", &n );
    }
  }


  if ( query == 1 ) {		/* 次数入力 */
    fprintf( stderr, "#coeff: " );
    scanf( "%d", &n );
  }
  if ( n > SIZE ) {		/* エラー処理 */
    fprintf( stderr, "error: #coeff. should be less than or equal to %d.\n", SIZE );
    return 1;
  }


  printf(" %d\n", n);
				/* データ入力 */
  for (j=0; j<n; j++) { 
    scanf( "%lf %lf", &x, &y );
    c = 1;
    for (i=0; i<n; i++) {
      printf( "  %.12le", c );
      c  *= x;
    }
    printf( "    %.12le\n", y );
  }

  printf("\n");

}