class RBSTree(Template): def __init__(self, preload = []): self.li = RedBlackBST() for i in preload: # Init is dumb :( self.add(self, i) def add(self, element): self.li.put(element, 1) def delete(self, index): self.li.delete(self.li.select(index)) def remove(self, element): self.li.delete(element) def rank(self, element): return self.li.rank(element) def select(self, index): return self.li.select(index) def iter(self): return iter(self.li.keys()) def reversed(self): return reversed(self.li.keys()) def count(self, element): return self.li.get(element) def successor(self, value): return self.li.floor(value + 1) def predecessor(self, value): return self.li.ceiling(value - 1) def size(self): return self.li.size()
ST.put(datetime.strptime(time, '%H:%M:%S'), destination) # answer queries for q in lines[n + 1:len(lines)]: query = q.strip().split() command = query[0] # cancel flight by deleting from ST if command == 'cancel': ST.delete(datetime.strptime(query[1], '%H:%M:%S')) # delay a flight by d amount of seconds elif command == 'delay': s, d = query[1:] time = datetime.strptime(s, '%H:%M:%S') val = ST.get(time) ST.delete(time) updated_t = time + timedelta(seconds=int(d)) ST.put(updated_t, val) # reroute a flight such that the destination changes for a given key elif command == 'reroute': s, c = query[1:] ST.put(datetime.strptime(s, '%H:%M:%S'), c) # query ST for time, print destination if time exists, else '-' elif command == 'destination': time = datetime.strptime(query[1], '%H:%M:%S') if ST.get(time) is not None: print(ST.get(time)) else:
class HugeRedBlackBSTMethods(unittest.TestCase): def setUp(self): random.seed(0) self.L = random.sample(range(10**6), 10**4) self.S = sorted(self.L) self.st = RedBlackBST() for x in self.L: self.st.put(x, x) def test_put_and_get(self): st = self.st for x in st.keys(): self.assertEqual(st.get(x), x) for x in st.keys(): st.put(x, st.get(x) - 1) for x in st.keys(): self.assertEqual(st.get(x), x - 1) def test_keys(self): i = 0 for k in self.st.keys(): self.assertEqual(k, self.S[i]) i += 1 def test_min(self): self.assertEqual(self.st.min(), min(self.L)) def test_max(self): self.assertEqual(self.st.max(), max(self.L)) def test_delete_min(self): self.st.delete_min() self.assertEqual(self.st.min(), min(self.S[1:])) def test_delete_max(self): self.st.delete_max() self.assertEqual(self.st.max(), max(self.S[:-1])) def test_min_priority_queue(self): i = 0 while not self.st.is_empty(): self.assertEqual(self.S[i], self.st.min()) self.st.delete_min() i += 1 def test_max_priority_queue(self): i = len(self.S) - 1 while not self.st.is_empty(): self.assertEqual(self.S[i], self.st.max()) self.st.delete_max() i -= 1 def test_flights(self): self.st = RedBlackBST() schedule = [ ["09:00:00", "Chicago"], ["09:00:03", "Phoenix"], ["09:00:13", "Houston"], ["09:00:59", "Chicago"], ["09:01:10", "Houston"], ["09:03:13", "Chicago"], ["09:10:11", "Seattle"], ["09:10:25", "Seattle"], ["09:14:25", "Phoenix"], ["09:19:32", "Chicago"], ["09:19:46", "Chicago"], ["09:21:05", "Chicago"], ["09:22:43", "Seattle"], ["09:22:54", "Seattle"], ["09:25:52", "Chicago"], ["09:35:21", "Chicago"], ["09:36:14", "Seattle"], ["09:37:44", "Phoenix"], ] for time, city in schedule: self.st.put(time, city) for time, city in schedule: self.assertEqual(city, self.st.get(time)) self.assertEqual(len(self.st.keys()), len(schedule))