another day of coding

11/part1.py

@@ -0,0 +1,63 @@
+#!/usr/bin/python
+
+import re
+
+RE_PAIR = re.compile(r'(.)\1.*(.)\2')
+
+def get_next_char(ch):
+    i = ord(ch) + 1
+    if i > 122:
+        return (True, 'a')
+    return (False, chr(i))
+
+
+def get_next_password(passwd):
+
+    result = ""
+    copy = False
+    overflow = None
+    for pos in reversed(range(len(passwd))):
+        if not copy:
+            (overflow, ch) = get_next_char(passwd[pos])
+            result = ch + result
+            copy = not overflow
+        else:
+            result = passwd[pos] + result
+    if overflow:
+        result = 'a' + result
+    return result
+
+def check_password(passwd):
+
+    if passwd.count('i') > 0:
+        return False
+    if passwd.count('l') > 0:
+        return False
+    if re.search(RE_PAIR, passwd) is None:
+        return False
+
+    for pos in range(len(passwd)-2):
+        x1 = ord(passwd[pos])
+        x2 = ord(passwd[pos+1])
+        x3 = ord(passwd[pos+2])
+        if (x1 +1 != x2):
+            continue
+        if (x2 +1 != x3):
+            continue
+        break
+    else:
+        return False
+
+    return True
+
+
+def main():
+    input = 'vzbxkghb';
+    while True:
+        input = get_next_password(input)
+        if check_password(input):
+            break
+    print input
+
+if __name__ == "__main__":
+    main()

11/part2.py

@@ -0,0 +1,67 @@
+#!/usr/bin/python
+
+import re
+
+RE_PAIR = re.compile(r'(.)\1.*(.)\2')
+
+def get_next_char(ch):
+    i = ord(ch) + 1
+    if i > 122:
+        return (True, 'a')
+    return (False, chr(i))
+
+
+def get_next_password(passwd):
+
+    result = ""
+    copy = False
+    overflow = None
+    for pos in reversed(range(len(passwd))):
+        if not copy:
+            (overflow, ch) = get_next_char(passwd[pos])
+            result = ch + result
+            copy = not overflow
+        else:
+            result = passwd[pos] + result
+    if overflow:
+        result = 'a' + result
+    return result
+
+def check_password(passwd):
+
+    if passwd.count('i') > 0:
+        return False
+    if passwd.count('l') > 0:
+        return False
+    if re.search(RE_PAIR, passwd) is None:
+        return False
+
+    for pos in range(len(passwd)-2):
+        x1 = ord(passwd[pos])
+        x2 = ord(passwd[pos+1])
+        x3 = ord(passwd[pos+2])
+        if (x1 +1 != x2):
+            continue
+        if (x2 +1 != x3):
+            continue
+        break
+    else:
+        return False
+
+    return True
+
+
+def main():
+    input = 'vzbxkghb';
+    while True:
+        input = get_next_password(input)
+        if check_password(input):
+            break
+    while True:
+        input = get_next_password(input)
+        if check_password(input):
+            break
+    print input
+
+if __name__ == "__main__":
+    main()