day 14

d14/d14_1.py

@@ -0,0 +1,22 @@
+import sys
+L = sys.stdin.read().splitlines()
+seed = L[0]
+L = L[2:]
+L = [ l.split() for l in L ]
+D = { tuple(k):v for [k,_,v] in L }
+print(seed, D)
+for step in range(10):
+	C = ["X"]  # X is their to avoid empty list when comparing to previous char
+	for (a,b) in zip(seed, seed[1:]):
+		if a != C[-1]:
+			C.append(a)
+		if (a,b) in D:
+			C.append(D[(a,b)])
+		C.append(b)
+	seed = "".join(C)
+	print(step+1, len(seed), seed[1:])
+from collections import Counter
+C = Counter(seed)
+del C["X"]
+print(C, C.values(), max(C.values())-min(C.values()))
+# store 40 iterations will be 20*2^39~=21TB ...

d14/d14_2.py

@@ -0,0 +1,27 @@
+import sys
+L = sys.stdin.read().splitlines()
+seed = L[0]
+L = L[2:]
+L = [ l.split() for l in L ]
+D = { tuple(k):v for [k,_,v] in L }
+def reprpairs(P):
+	return " ".join(f"{a}{b}:{v}" for ((a,b),v) in P.items())
+E = { K:0 for (K,_) in D.items() }
+for (a,b) in zip(seed, seed[1:]):
+	E[(a,b)] += 1
+#print(reprpairs(E))
+for step in range(40):
+	F = { K:0 for (K,_) in D.items() }
+	for ((a,b),v) in E.items():
+		j = D[(a,b)]
+		F[(a,j)] += v
+		F[(j,b)] += v
+	E = F
+	#print(step+1,reprpairs(E))
+from collections import defaultdict as dfd
+S = dfd(int)
+for ((a,b),v) in E.items():
+	S[a]+=v
+	S[b]+=v
+S ={ k:(a+b)  for (k,v) in S.items()  for (a,b) in [divmod(v,2)]  }
+print(S, max(S.values())-min(S.values()))

d14/dograph.py

@@ -0,0 +1,9 @@
+import sys
+L = sys.stdin.read().splitlines()
+L = L[2:]
+L = [ l.split() for l in L ]
+D = { tuple(k):v for [k,_,v] in L }
+print('digraph G {')
+for ((k,l),v) in D.items():
+    print(f'{k} -> {v} [label="{l}"];')
+print("}")

d14/input

@@ -0,0 +1,102 @@
+SVKVKCCBNHNSOSCCOPOC
+
+BB -> O
+BC -> F
+BF -> O
+BH -> O
+BK -> B
+BN -> F
+BO -> S
+BP -> O
+BS -> O
+BV -> O
+CB -> V
+CC -> K
+CF -> N
+CH -> C
+CK -> K
+CN -> P
+CO -> H
+CP -> O
+CS -> P
+CV -> V
+FB -> H
+FC -> F
+FF -> V
+FH -> N
+FK -> N
+FN -> P
+FO -> V
+FP -> B
+FS -> V
+FV -> K
+HB -> B
+HC -> S
+HF -> P
+HH -> B
+HK -> S
+HN -> V
+HO -> V
+HP -> O
+HS -> B
+HV -> H
+KB -> C
+KC -> C
+KF -> B
+KH -> B
+KK -> B
+KN -> H
+KO -> S
+KP -> S
+KS -> N
+KV -> K
+NB -> P
+NC -> S
+NF -> H
+NH -> B
+NK -> N
+NN -> K
+NO -> N
+NP -> B
+NS -> P
+NV -> F
+OB -> V
+OC -> V
+OF -> H
+OH -> C
+OK -> O
+ON -> P
+OO -> V
+OP -> F
+OS -> H
+OV -> F
+PB -> H
+PC -> B
+PF -> P
+PH -> K
+PK -> F
+PN -> B
+PO -> N
+PP -> V
+PS -> S
+PV -> B
+SB -> C
+SC -> C
+SF -> K
+SH -> S
+SK -> H
+SN -> P
+SO -> C
+SP -> P
+SS -> K
+SV -> B
+VB -> S
+VC -> P
+VF -> S
+VH -> V
+VK -> S
+VN -> V
+VO -> N
+VP -> F
+VS -> S
+VV -> O

d14/sample

@@ -0,0 +1,18 @@
+NNCB
+
+CH -> B
+HH -> N
+CB -> H
+NH -> C
+HB -> C
+HC -> B
+HN -> C
+NN -> C
+BH -> H
+NC -> B
+NB -> B
+BN -> B
+BB -> N
+BC -> B
+CC -> N
+CN -> C