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-rw-r--r--11_2024.py31
1 files changed, 31 insertions, 0 deletions
diff --git a/11_2024.py b/11_2024.py
new file mode 100644
index 0000000..a67f8cf
--- /dev/null
+++ b/11_2024.py
@@ -0,0 +1,31 @@
+input = "data/11_2024.txt"
+data = open(input).read().strip()
+data = [int(x) for x in data.split()]
+dp = {}
+
+
+def solve(x, t):
+ if (x, t) in dp:
+ return dp[(x, t)]
+ if t == 0:
+ res = 1
+ elif x == 0:
+ res = solve(1, t - 1)
+ elif len(str(x)) % 2 == 0:
+ dstr = str(x)
+ left = dstr[: len(dstr) // 2]
+ right = dstr[len(dstr) // 2 :]
+ left, right = (int(left), int(right))
+ res = solve(left, t - 1) + solve(right, t - 1)
+ else:
+ res = solve(x * 2024, t - 1)
+ dp[(x, t)] = res
+ return res
+
+
+def solve_all(t):
+ return sum(solve(x, t) for x in data)
+
+
+print(solve_all(25))
+print(solve_all(75))