Day 22 Part 1

2024/day22/code.py

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+#!/usr/bin/env python3
+
+import sys
+
+
+def mix_and_prune(secret, result):
+    return (secret ^ result) % 16777216
+
+
+def prg(secret):
+    nsec = mix_and_prune(secret, secret * 64)
+    nsec = mix_and_prune(nsec, nsec // 32)
+    return mix_and_prune(nsec, nsec * 2048)
+
+
+if __name__ == '__main__':
+    nums = [int(line.strip('\n')) for line in open(sys.argv[1])]
+
+    # challenge 1
+    res1 = 0
+    changes, values = {}, {}
+    for n in nums:
+        secret = n
+        changes[n] = [0] * 2000
+        values[n] = [0] * 2000
+        ob = int(str(secret)[-1])
+        for i in range(2000):
+            secret = prg(secret)
+            bananas = int(str(secret)[-1])
+            changes[n][i] = bananas - ob
+            values[n][i] = bananas
+            ob = bananas
+        res1 += secret
+
+    print(f"challenge 1:\n{res1}\n")
+    # for i, c in enumerate(changes[123][3:10]):
+    #     if c > 0: print(changes[123][i:i+4])
+    print(changes[123][:10])
+
+    # challenge 2
+
+    res2 = ""
+    print(f"challenge 2:\n{res2}")
+

2024/day22/example

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+1
+10
+100
+2024

2024/day22/example1

@@ -0,0 +1 @@
+123

2024/day22/example2

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+1
+2
+3
+2024