public static void main ( String [ ] args ) {
  FastReader fs = new FastReader ( ) ;
  StringBuilder sb = new StringBuilder ( ) ;
  int vp = fs . nextInt ( ) ;
  int vd = fs . nextInt ( ) ;
  int t = fs . nextInt ( ) ;
  int f = fs . nextInt ( ) ;
  int c = fs . nextInt ( ) ;
  if ( vd <= vp ) {
    System . out . println ( 0 ) ;
    return ;
  }
  int bijous = 0 ;
  double distance = vp * t ;
  double time = 0 ;
  while ( Double . compare ( c , distance ) > 0 ) {
    time = distance / ( vd - vp ) ;
    distance = time * vd ;
    if ( Double . compare ( c , distance ) <= 0 ) break ;
    bijous ++ ;
    distance += ( ( distance / vd ) + f ) * vp ;
  }
  System . out . println ( bijous ) ;
}

public static void main ( String [ ] args ) { FastReader fs = new FastReader ( ) ; StringBuilder sb = new StringBuilder ( ) ; int vp = fs . nextInt ( ) ; int vd = fs . nextInt ( ) ; int t = fs . nextInt ( ) ; int f = fs . nextInt ( ) ; int c = fs . nextInt ( ) ; if ( vd <= vp ) { System . out . println ( 0 ) ; return ; } int bijous = 0 ; double distance = vp * t ; double time = 0 ; while ( Double . compare ( c , distance ) > 0 ) { time = distance / ( vd - vp ) ; distance = time * vd ; if ( Double . compare ( c , distance ) <= 0 ) break ; bijous ++ ; distance += ( ( distance / vd ) + f ) * vp ; } System . out . println ( bijous ) ; }
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