iajsidfjaoisdm

15.hs

@@ -0,0 +1,38 @@
+import qualified Data.Map.Strict as Map
+import Data.Map.Strict (Map)
+import Debug.Trace
+import Control.Monad.State
+
+-- 1st is turn number
+-- 2nd is map of spoken
+-- 3rd is next number to speak
+type S = (Int, Map Int Int, Int)
+
+produceInitial lst =
+    let len = length lst
+        f acc (idx, el) = Map.insert el idx acc
+        initMap = foldl f Map.empty $ zip [0..] lst
+    in (len, initMap, 0)
+
+speak :: Int -> State S Int
+speak n = do
+    (turn, spoken, nextSpeak) <- get
+    let lastSpoke = Map.lookup nextSpeak spoken
+    let spoken2 = Map.insert nextSpeak turn spoken
+    let nextSpeak2 = case lastSpoke of
+            Nothing -> 0
+            Just n -> turn - n
+    let result = (turn + 1, spoken2, nextSpeak2)
+    -- modify (\_ -> traceShow result result)
+    modify (\_ -> result)
+    return nextSpeak
+    
+speakStream lst = (++) lst $ flip evalState initial $ mapM speak [0..]
+    where initial = produceInitial lst
+
+actualInput = [5,1,9,18,13,8,0]
+exInput = [0,3,6]
+n = 30000000
+-- n = 2020
+
+main = do print (speakStream actualInput !! (n-1))

16.py

@@ -0,0 +1,388 @@
+ex="""
+class: 1-3 or 5-7
+row: 6-11 or 33-44
+seat: 13-40 or 45-50
+
+your ticket:
+7,1,14
+
+nearby tickets:
+7,3,47
+40,4,50
+55,2,20
+38,6,12
+""".strip()
+
+actual="""departure location: 26-404 or 427-951
+departure station: 43-307 or 325-967
+departure platform: 39-383 or 399-950
+departure track: 31-157 or 178-969
+departure date: 28-109 or 135-950
+departure time: 38-622 or 631-958
+arrival location: 35-61 or 69-957
+arrival station: 36-216 or 241-951
+arrival platform: 41-586 or 606-967
+arrival track: 47-573 or 586-951
+class: 31-439 or 445-957
+duration: 35-925 or 939-965
+price: 41-473 or 494-952
+route: 45-742 or 754-963
+row: 41-338 or 357-952
+seat: 45-848 or 873-968
+train: 37-183 or 197-952
+type: 46-509 or 522-974
+wagon: 32-69 or 81-967
+zone: 37-759 or 780-967
+
+your ticket:
+103,197,83,101,109,181,61,157,199,137,97,179,151,89,211,59,139,149,53,107
+
+nearby tickets:
+209,822,916,528,93,531,551,797,387,835,278,464,546,945,732,88,678,145,559,287
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+671,563,276,372,108,946,263,245,688,313,439,203,699,148,360,454,290,755,687,55
+""".strip()
+
+ex2="""class: 0-1 or 4-19
+row: 0-5 or 8-19
+seat: 0-13 or 16-19
+
+your ticket:
+11,12,13
+
+nearby tickets:
+3,9,18
+15,1,5
+5,14,9""".strip()
+
+curr="fields"
+fields=[]
+your=[]
+nearby=[]
+for line in actual.splitlines():
+  line=line.strip()
+  if curr=="fields":
+    if line=="": continue
+    if line.startswith("your ticket:"):
+      curr="your"
+      continue
+    k,v=line.split(": ")
+    conds=[]
+    for cond in v.split(" or "):
+      l,r=list(map(int, cond.split("-")))
+      conds.append((l, r))
+    fields.append((k, conds))
+  elif curr=="your":
+    if line=="": continue
+    if line.startswith("nearby tickets:"):
+      curr="nearby"
+      continue
+    your=list(map(int, line.split(",")))
+  elif curr=="nearby":
+    nearby.append(list(map(int, line.split(","))))
+
+# print(fields)
+# print(your)
+# print(nearby)
+
+values=[]
+for i in range(len(your)):
+  values.append(set())
+for (idx, ticket) in enumerate([your]+nearby):
+  ticket_valid=True
+  for val in ticket:
+    isvalid=False
+    for (prop, conds) in fields:
+      for l, r in conds:
+        if val>=l and val<=r:
+          isvalid=True
+          break
+    if not isvalid:
+      ticket_valid = False
+      break
+  if ticket_valid:
+    assert len(ticket)==len(values)
+    for i, n in enumerate(ticket):
+      values[i].add(n)
+
+print(len(values))
+valid_for=[]
+for (prop, conds) in fields:
+  this_valid_for=set()
+  for (idx, prop_values) in enumerate(values):
+    all_valid=True
+    for val in prop_values:
+      this_valid=False
+      for l, r in conds:
+        if val>=l and val<=r:
+          this_valid=True
+          break
+      if not this_valid: all_valid=False
+    if all_valid: this_valid_for.add(idx)
+  valid_for.append((prop, this_valid_for))
+
+valid_for.sort(key=lambda c: len(c[1]))
+print(valid_for)
+
+pairings=list()
+for i in range(len(your)):
+  pairings.append("")
+used=set()
+for k, vs in valid_for:
+  if len(vs)==0: continue
+  found=False
+  for v in vs:
+    if v in used: continue
+    pairings[v] = k
+    used.add(v)
+    found=True
+  assert found, f"{k}, {vs}, {pairings}"
+
+ticket=dict(zip(pairings, your))
+p=1
+for k, v in ticket.items():
+  if k.startswith("departure"):
+    p*=v
+print(p)