add some exe

interview_cake/strings/online_poker.py

@@ -0,0 +1,28 @@
+#!/bin/python
+
+"""
+Write a function to tell us if a full deck of cards shuffled_deck is a single riffle of two other halves half1 and half2.
+
+We'll represent a stack of cards as a list of integers in the range 1..521..52 (since there are 5252 distinct cards in a deck).
+Why do I care? A single riffle is not a completely random shuffle. If I'm right, I can make more informed bets and get rich and finally prove to my ex that I am not a "loser with an unhealthy cake obsession" (even though it's too late now because she let me go and she's never getting me back).
+"""
+
+def is_single_riffle(half1, half2, shuffled_deck,
+                     shuffled_deck_index=0, half1_index=0, half2_index=0):
+    if shuffled_deck_index == len(shuffled_deck):
+        return True
+
+    if ((half1_index < len(half1)) and
+            half1[half1_index] == shuffled_deck[shuffled_deck_index]):
+        half1_index += 1
+
+    elif ((half2_index < len(half2)) and
+            half2[half2_index] == shuffled_deck[shuffled_deck_index]):
+        half2_index += 1
+    else:
+        return False
+
+    shuffled_deck_index += 1
+    return is_single_riffle(
+        half1, half2, shuffled_deck, shuffled_deck_index,
+        half1_index, half2_index)