static int josephify ( int n ) {
  int position = msbPos ( n ) ;
  int j = 1 << ( position - 1 ) ;
  n = n ^ j ;
  n = n << 1 ;
  n = n | 1 ;
  return n ;
}

static int josephify ( int n ) { int position = msbPos ( n ) ; int j = 1 << ( position - 1 ) ; n = n ^ j ; n = n << 1 ; n = n | 1 ; return n ; }
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