Day 5

2020/day5.py

@@ -0,0 +1,38 @@
+EX = "FBFBBFFRLR"
+
+
+def main():
+    with open("day5.txt", "rt") as f:
+        lines = [line.rstrip() for line in f.readlines()]
+    
+    # Part 1
+    ids = [get_id(c) for c in lines]
+    print("Max seat ID:", max(ids))
+
+    # Part 2
+    for i in range(min(ids), max(ids)):
+        if i not in ids and i-1 in ids and i+1 in ids:
+            print("Happy little seat:", i)
+            break
+
+
+def get_id(code):
+    row_base, row_part = 0, 128
+    col_base, col_part = 0, 8
+    for c in code:
+        if c == "F":
+            row_part //= 2
+        elif c == "B":
+            row_part //= 2
+            row_base += row_part
+        elif c == "L":
+            col_part //= 2
+        elif c == "R":
+            col_part //= 2
+            col_base += col_part
+    return row_base * 8 + col_base
+    # so you're saying it was actually binary?... it's 3AM here.
+
+
+if __name__ == "__main__":
+    main()