Implement main logic for counting crossings and determining final position in the lock mechanism

Day1/Part1/main.py

@@ -0,0 +1,30 @@
+START_POS = 50
+MODULO = 100 
+
+position = START_POS
+anzahl_null = 0
+
+with open("input.txt", encoding="utf-8") as f:
+    for line in f:
+        line = line.strip()
+        if not line:
+            continue
+
+        richtung = line[0].upper()
+        schritte = int(line[1:])
+
+        if richtung == "L":
+            position = (position - schritte) % MODULO
+        elif richtung == "R":
+            position = (position + schritte) % MODULO
+        else:
+            raise ValueError(f"Unbekannte Richtung in Zeile: {line}")
+
+        if position == 0:
+            anzahl_null += 1
+
+print("Anzahl, wie oft 0 erreicht wird:", anzahl_null)
+print("Endposition:", position)
+
+# times 0 is reached: 984
+# end position: 90