add some exe

interview_cake/data_structures/inflight_entrain.py

@@ -0,0 +1,42 @@
+#!/bin/python
+
+"""
+Users on longer flights like to start a second movie right when their first one ends, 
+but they complain that the plane usually lands before they can see the ending. 
+So you're building a feature for choosing two movies whose total runtimes will equal the exact flight length.
+
+Write a function that takes an integer flight_length (in minutes) and a 
+list of integers movie_lengths (in minutes) and returns a boolean indicating 
+whether there are two numbers in movie_lengths whose sum equals flight_length.
+
+When building your function:
+
+Assume your users will watch exactly two movies
+Don't make your users watch the same movie twice
+Optimize for runtime over memory
+"""
+
+def is_there_two_movies(flight_length, movie_lengths):
+    movie_lengths_seen = set()
+
+    for first_movie_length in movie_lengths:
+        matching_second_movie_length = flight_length - first_movie_length
+        if matching_second_movie_length in movie_lengths_seen:
+            return True
+        movie_lengths_seen.add(first_movie_length)
+
+    return False
+
+
+
+if __name__ == '__main__':
+
+    flight_length = 10
+
+    movie_lengths = [2, 4, 7]
+    print(is_there_two_movies(flight_length, movie_lengths))
+    print("Should be True")
+
+    movie_lengths = [5, 6, 7, 8]
+    print(is_there_two_movies(flight_length, movie_lengths))
+    print("Should be False")