Data update

Task/Universal-Turing-machine/Python/universal-turing-machine-2.py

@@ -0,0 +1,24 @@
+def busy_beaver(beavers):
+  tape = dict()
+  pos = beaver = steps = 0
+
+  while True:
+    steps += 1
+    value = tape.get(pos, 0)
+    new_value, direction, next_beaver = beavers[beaver * 2 + value]
+    tape[pos] = int(new_value)
+    if next_beaver == 'H': return steps, sum(tape.values())
+    pos += 1 if direction == 'R' else -1
+    beaver = ord(next_beaver) - 65
+
+
+rules = ['1RH not_used',
+         '1RB 1LB 1LA 1RH',
+         '1RB 1RH 0RC 1RB 1LC 1LA',
+         '1RB 1LB 1LA 0LC 1RH 1LD 1RD 0RA',
+         '1RB 1LC 1RC 1RB 1RD 0LE 1LA 1LD 1RH 0LA']
+
+for beavers in rules:
+  beavers = beavers.split()
+  steps, ones = busy_beaver(beavers)
+  print(f'BB({len(beavers)//2}) = {steps:>10,} steps with {ones:>5,} ones')