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import sys
from collections import Counter, defaultdict
inf = sys.argv[1] if len(sys.argv) > 1 else "day21data.txt"
ll = [int(x.split(": ")[1]) for x in open(inf).read().strip().split("\n")]
dice = 1
score = [0, 0]
done = False
while not done:
for player in range(2):
newpos = (ll[player] + dice + dice + 1 + dice + 2 - 1) % 10 + 1
dice += 3
score[player] += newpos
ll[player] = newpos
if score[player] >= 1000:
print(score[1 - player] * (dice - 1))
done = True
break
ll = [int(x.split(": ")[1]) for x in open(inf).read().strip().split("\n")]
dice = list(
Counter(i + j + k for i in (1, 2, 3) for j in (1, 2, 3) for k in (1, 2, 3)).items()
)
universes = {((0, ll[0]), (0, ll[1]), 0): 1}
wins = [0, 0]
while universes:
cpy = list(universes.items())
universes = defaultdict(int)
for state, cnt in cpy:
turn = state[2]
score, pos = state[turn]
state = list(state)
state[2] = 1 - turn
for roll, dcount in dice:
newpos = (pos + roll - 1) % 10 + 1
newscore = score + newpos
if newscore >= 21:
wins[turn] += cnt * dcount
continue
state[turn] = (newscore, newpos)
universes[tuple(state)] += cnt * dcount
print(max(wins))
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