Start 2019: solve day 1

2019/01_fuel.py

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+#!/usr/bin/env python3
+import fileinput
+masses = [int(line) for line in fileinput.input()]
+
+def fuel(mass):
+    return int(mass / 3) - 2
+
+def fuelrec(mass):
+    f = fuel(mass)
+    total = 0
+    while f >= 0:
+        total += f
+        mass = f
+        f = fuel(mass)
+    return total
+
+print(sum(map(fuel, masses)))
+print(sum(map(fuelrec, masses)))

2019/input/1

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