2022 begins.

2021/14/data

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

2021/14/example_data

@@ -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

2021/14/main.py

@@ -0,0 +1,45 @@
+str = ''
+data = {}
+letters = []
+with open('data', 'r') as fp:
+    for line in fp:
+        if(' -> ' in line):
+            pair = line.strip().split(' -> ')
+            data[pair[0]] = pair[1]
+        elif(len(line) > 1):
+            str = line.strip()
+
+for ch in str:
+    if(not ch in letters):
+        letters.append(ch)
+letters.sort()
+
+# # DEBUG(dev):
+# print(data)
+# print(str)
+# print(letters)
+
+for step in range(0, 40):
+    print('BEFORE:', str)
+    new_str = ''
+    for i in range(0, len(str) - 1):
+        lookup = str[i:i+2]
+        print(lookup)
+        if(lookup in data.keys()):
+            new_str += str[i] + data[lookup]
+        else:
+            new_str += str[i]
+    new_str += str[-1]
+    str = new_str
+
+counts = {}
+for ch in str:
+    if(ch in counts):
+        counts[ch] += 1
+    else:
+        counts[ch] = 1
+
+counts_list = list(counts.values())
+counts_list.sort()
+
+print(counts_list[-1] - counts_list[0])

2021/14/main2.py

@@ -0,0 +1,45 @@
+str = ''
+data = {}
+letters = []
+with open('data', 'r') as fp:
+    for line in fp:
+        if(' -> ' in line):
+            pair = line.strip().split(' -> ')
+            data[pair[0]] = pair[1]
+        elif(len(line) > 1):
+            str = line.strip()
+
+for ch in str:
+    if(not ch in letters):
+        letters.append(ch)
+letters.sort()
+
+# # DEBUG(dev):
+# print(data)
+# print(str)
+# print(letters)
+
+for step in range(0, 40):
+    new_str = ''
+    for i in range(0, len(str) - 1):
+        lookup = str[i:i+2]
+        if(lookup in data.keys()):
+            new_str += str[i] + data[lookup]
+        else:
+            new_str += str[i]
+    new_str += str[-1]
+    str = new_str
+    print('Step ', step+1, ', length', len(str))
+
+    # NOTE(dev): un-indent this (take it out of the for loop) for just a final answer
+    counts = {}
+    for ch in str:
+        if(ch in counts):
+            counts[ch] += 1
+        else:
+            counts[ch] = 1
+
+    counts_list = list(counts.values())
+    counts_list.sort()
+
+    print(counts_list, counts_list[-1] - counts_list[0])