tobiasvl
diff --git a/‎2020/05/boarding.py
Lines changed: 24 additions & 0 deletions b/‎2020/05/boarding.py
Lines changed: 24 additions & 0 deletions
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+#!/usr/bin/python3
+def seat_id(boarding_pass):
+    boarding_pass = boarding_pass.replace('F', '0').replace('B', '1').replace('L', '0').replace('R', '1')
+    boarding_pass = int(boarding_pass, 2)
+    row = boarding_pass >> 3
+    seat = boarding_pass & 7
+    return (row * 8) + seat
+
+def main():
+    passes = []
+    with open('input') as f:
+        passes = [line.strip() for line in f]
+
+    seat_ids = sorted([seat_id(boarding_pass) for boarding_pass in passes])
+    highest_id = max(seat_ids)
+    print(highest_id)
+
+    lowest_id = min(seat_ids)
+    for seat in range(lowest_id, highest_id):
+        if seat not in seat_ids:
+            print(seat)
+
+if __name__ == "__main__":
+    main()