static int binarySearch ( int arr [ ] , int low , int high ) {
  if ( high < low ) return - 1 ;
  int mid = ( low + high ) / 2 ;
  int midValue = arr [ mid ] ;
  if ( mid == arr [ mid ] ) return mid ;
  int leftindex = Math . min ( mid - 1 , midValue ) ;
  int left = binarySearch ( arr , low , leftindex ) ;
  if ( left >= 0 ) return left ;
  int rightindex = Math . max ( mid + 1 , midValue ) ;
  int right = binarySearch ( arr , rightindex , high ) ;
  return right ;
}

static int binarySearch ( int arr [ ] , int low , int high ) { if ( high < low ) return - 1 ; int mid = ( low + high ) / 2 ; int midValue = arr [ mid ] ; if ( mid == arr [ mid ] ) return mid ; int leftindex = Math . min ( mid - 1 , midValue ) ; int left = binarySearch ( arr , low , leftindex ) ; if ( left >= 0 ) return left ; int rightindex = Math . max ( mid + 1 , midValue ) ; int right = binarySearch ( arr , rightindex , high ) ; return right ; }
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