I believe the answer to be one. She states in the puzzle that she cut the deck in two. It dose not mention that she shuffled the deck. It is well known that all new decks of card come in suits, alternating betwwen red and black. with the ace of spades being the bottom card. Since you have only two suits in each deck, you should start with red count out 13 cards and then switch to black for the last 13. If she shuffled the answer would be close to 26 to the 26th power.