From 02453aca1dfe4835a222041a7abd472da7085fa0 Mon Sep 17 00:00:00 2001
From: npc-strider <npc.strider@gmail.com>
Date: Fri, 25 Dec 2020 13:39:56 +0800
Subject: [PATCH] Thanks, and have fun :)

---
 24/c.py | 14 ++------------
 25/a.py | 30 ++++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+), 12 deletions(-)
 create mode 100644 25/a.py

diff --git a/24/c.py b/24/c.py
index f2f35ab..a5893a3 100644
--- a/24/c.py
+++ b/24/c.py
@@ -22,14 +22,10 @@ def getHexAdjacent(vec):
     })
     return adj
 
-def getHexAdjacentState(vec):
-    getHexAdjacent
-    return True
-
 def toggle(boolean):
     return (False if boolean else True)
 
-grid = {(0,0,0):{'state':False}}#'adj':getHexAdjacent((0,0,0)), 
+grid = {(0,0,0):{'state':False}}
 
 vectors = []
 for direction in directions:
@@ -39,12 +35,11 @@ for direction in directions:
         vec = getHexAdjacent(vec)[dir_]
     grid.update({vec:{'state':toggle(grid[vec]['state'] if vec in grid else False)}})
     vectors.append(vec)
-# print({x:vectors.count(x) for x in vectors})
-# print(len([vectors.count(x) for x in vectors if (vectors.count(x) % 2 == 1)]))
 
 #Part 1
 print(len([ x for x in grid if (grid[x]['state'] == True)])) # Black => True, white => false
 
+#Part 2
 grid_ = deepcopy(grid)  #expand our space by one hextile in each direction
 for cell in grid:
     adj = getHexAdjacent(cell)
@@ -66,16 +61,11 @@ while i < 100:
                 if grid[cell_]['state'] == True:
                     c+=1
             else:
-                # print(len(grid_))
                 grid_.update({cell_:{'state':False}})
 
         if grid[cell]['state'] == True and (c == 0 or c > 2):
-            # print('false')
             grid_[cell]['state'] = False
         elif grid[cell]['state'] == False and c == 2:
-            # print('true')
             grid_[cell]['state'] = True
-    # print(len(grid))
-    # print(len(grid_))
     i+=1
 print(len([ x for x in grid_ if (grid_[x]['state'] == True)]))
diff --git a/25/a.py b/25/a.py
new file mode 100644
index 0000000..1b507a3
--- /dev/null
+++ b/25/a.py
@@ -0,0 +1,30 @@
+
+div = 20201227
+
+card_public = 5764801
+door_public = 17807724
+
+def transform(subject,lpt):
+    value = 1
+    c = 0
+    while c < lpt:
+        value *= subject
+        value = value % div
+        # print(c, value)
+        c+=1
+    return value
+
+def bruteforce(value_goal):
+    lpt = 1
+    value = 1
+    while True:
+        value *= 7
+        value = value % div
+        if value == value_goal:
+            return lpt
+        lpt += 1
+
+card_lpt_size = bruteforce(card_public)
+door_lpt_size = bruteforce(door_public)
+print(card_lpt_size, door_lpt_size)
+print(transform(door_public,card_lpt_size))
\ No newline at end of file