Solve 2018 day 5 and 6. Nice.

2018/d5.py

@@ -0,0 +1,46 @@
+from lib import LETTERS_LOWER
+
+
+def part_1(data):
+    data = data.strip()
+    i = 0
+    while i < (len(data) - 1):
+        a, b = data[i], data[i + 1]
+        if (a.upper() == b.upper()) and (a != b):
+            data = data[:i] + data[i + 2 :]
+            i = max(0, i - 1)
+        else:
+            i += 1
+    print(len(data))
+
+
+def part_2(data):
+    data_orig = data.strip()
+    min_len = float("inf")
+    for c in LETTERS_LOWER:
+        data = str(data_orig)
+        data = data.replace(c, "")
+        data = data.replace(c.upper(), "")
+        i = 0
+        while i < (len(data) - 1):
+            a, b = data[i], data[i + 1]
+            if (a.upper() == b.upper()) and (a != b):
+                data = data[:i] + data[i + 2 :]
+                i = max(0, i - 1)
+            else:
+                i += 1
+
+        min_len = min(min_len, len(data))
+    print(min_len)
+
+
+def main():
+    input_file = __file__.replace(".py", ".txt")
+    with open(input_file) as f:
+        data = f.read()
+    part_1(data)
+    part_2(data)
+
+
+if __name__ == "__main__":
+    main()