1 files changed, 26 insertions, 0 deletions
diff --git a/09/main.py b/09/main.py
new file mode 100755
index 0000000..7fb235f
--- /dev/null
+++ b/09/main.py
@@ -0,0 +1,26 @@
+#!/bin/python3
+import sys
+
+def derivative(numbers):
+  output = []
+  for x in range(len(numbers) - 1):
+    output.append(numbers[x+1] - numbers[x])
+  return output
+
+output = 0
+for line in sys.stdin:
+  line = line.strip()
+
+  numbers = [int(x) for x in line.split()]
+  derivatives = [numbers]
+  while len([x for x in derivatives[-1] if x != 0]) > 0:
+    derivatives.append(derivative(derivatives[-1]))
+
+  prediction = 0
+  for d in derivatives:
+    prediction += d[-1]
+
+  output += prediction
+
+print(f">> {output}")
+