public static void main ( String [ ] args ) {
  Scanner in = new Scanner ( System . in ) ;
  float vp , vd , t , f , c ;
  vp = in . nextFloat ( ) ;
  vd = in . nextFloat ( ) ;
  t = in . nextFloat ( ) ;
  f = in . nextFloat ( ) ;
  c = in . nextFloat ( ) ;
  double posd , posp , time ;
  int cnt = 0 ;
  posp = vp * t ;
  posd = 0 ;
  if ( vp > vd ) {
    System . out . println ( 0 ) ;
    System . exit ( 0 ) ;
  }
  while ( true ) {
    time = Math . abs ( posd - posp ) / Math . abs ( vd - vp ) ;
    posp += vp * time ;
    if ( posp >= c ) break ;
    else cnt ++ ;
    posp += vp * ( time + f ) ;
    posd = 0 ;
  }
  System . out . println ( cnt ) ;
}

public static void main ( String [ ] args ) { Scanner in = new Scanner ( System . in ) ; float vp , vd , t , f , c ; vp = in . nextFloat ( ) ; vd = in . nextFloat ( ) ; t = in . nextFloat ( ) ; f = in . nextFloat ( ) ; c = in . nextFloat ( ) ; double posd , posp , time ; int cnt = 0 ; posp = vp * t ; posd = 0 ; if ( vp > vd ) { System . out . println ( 0 ) ; System . exit ( 0 ) ; } while ( true ) { time = Math . abs ( posd - posp ) / Math . abs ( vd - vp ) ; posp += vp * time ; if ( posp >= c ) break ; else cnt ++ ; posp += vp * ( time + f ) ; posd = 0 ; } System . out . println ( cnt ) ; }
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