1. import random
2. from collections import defaultdict
3.  
4.  
5. history = []
6. last_seen_4 = 0
7. last_seen_5 = 0
8.  
9. def get4star():
10.     if random.randint(1,43) == 43:
11.         return "Amber"
12.    
13.     return "not Amber :("
14.    
15.    
16.  
17. def gacha():
18.     global last_seen_5
19.     global last_seen_4
20.     GACHA = random.random()
21.    
22.     if GACHA <= 0.006 or last_seen_5 == 89:
23.         last_seen_5 = 0
24.         last_seen_4 = 0
25.         return "some 5 star"
26.    
27.     elif GACHA <= 0.057 or last_seen_4 == 9:
28.         last_seen_4 = 0
29.         last_seen_5 += 1
30.         return get4star()
31.     else:
32.         last_seen_5 +=1
33.         last_seen_4 +=1
34.         return "nice 3 star sword"
35.  
36. history_5_star = defaultdict(int)
37. history_total = []
38.  
39. for i in range(10000):
40.     history = []
41.     total_pull = 0
42.     featured_count = 0
43.     while(featured_count < 6):
44.         PULL = gacha()
45.         total_pull += 1
46.         history += [PULL]
47.         if PULL == "Amber":
48.             featured_count += 1
49.     history_total += [total_pull]
50.  
51.  
52. print("Average pulls required for C6 Amber" ,sum(history_total)/len(history_total))