Solve 2020 day 24 and 25 and 2018 day 23 part 2

2020/d25.py

@@ -0,0 +1,32 @@
+from lib import get_data, ints
+
+data = get_data(__file__)
+a, b = ints(data)
+
+v = 1
+subject_number = 7
+al, bl = None, None
+
+for loop in range(100_000_000):
+    v *= subject_number
+    v %= 20201227
+    if al is None and v == a:
+        al = loop + 1
+    if bl is None and v == b:
+        bl = loop + 1
+
+    if al and bl:
+        break
+
+assert al is not None
+assert bl is not None
+# print(al, bl)
+
+v = 1
+subject_number = b
+for _ in range(al):
+    v *= subject_number
+    v %= 20201227
+
+print(v)
+