#include <stdio.h>

/* calcula x^i */
double Pot( double x, int i) {
  double pot;
  int j;
  
  pot = 1;
  for ( j = 0; j < i; j++ )
    pot = pot * x;
  
  return pot;
}



/* calcula i! */
double Fat( int i ){
  double fat;
  int j;

  fat = 1;
  for ( j = 2; j <= i; j++ )
    fat = fat * j;
  
  return fat;
}


int main () {
  int    i;			/* indice do i-esimo termo da seq, e_i */
  double x,			/* real expoente de e^x */
    eps,			/* precisao epsilon */
    ei,eium,			/* e_i e e_{i-1} */
    dif;			/* |e_i-e_{i-1}| */

  scanf ( "%lf %lf", &x, &eps );

  i = 0;
  ei = 1; 
  dif = eps;
  while ( dif >= eps ) {
    printf ( "%d: %15.13f\n", i, ei );
    i++;
    eium = ei;
    ei = eium + Pot(x,i) / Fat(i);
    dif = ei - eium;
    if ( dif < 0 ) dif = -dif;
  }

  printf ( "%15.13f\n", ei );

  return 0;
}