Solve day3

day3/part2.py

@@ -0,0 +1,16 @@
+FILE = "input.txt"
+
+def main():
+    return sum(max_for_line(line.strip()) for line in open(FILE))
+
+def max_for_line(line: str) -> int:
+    voltage = 0
+    for m in range(11, -1, -1):
+        part = line[:-m] if m > 0 else line
+        battery = max(int(n) for n in part)
+        line = line[line.index(str(battery))+1:]
+        voltage += battery * (10**m)
+    return voltage
+
+if __name__ == "__main__":
+    print(main())