initial commit on day 9

4/1.py

@@ -0,0 +1,23 @@
+def validate(entry, required_fields):
+    for field in required_fields:
+        if field not in entry:
+            return False
+
+    return True
+
+entries = []
+entry = {}
+with open("input") as f:
+    for line in f:
+        line = line.strip()
+        if not line:
+            entries.append(entry)
+            entry = {}
+        else:
+            for field in line.split(" "):
+                key, value = field.split(":")
+                entry[key] = value
+    entries.append(entry)
+
+required = ['byr', 'iyr', 'eyr', 'hgt', 'hcl', 'ecl', 'pid']
+print(list(map(lambda x: validate(x, required), entries)).count(True))

4/2.py

@@ -0,0 +1,54 @@
+def validate_int(value, mi, ma):
+    value = int(value)
+    return mi <= value <= ma
+
+def validate_height(value):
+    v = int(value[:-2])
+    t = value[-2:]
+    if (t == "cm" and 150<=v<=193) or (t == "in" and 59<=v<=76):
+        return True
+    return False
+
+def validate_hex(h):
+    return h[0] == "#" and len(h[1:]) == 6 and is_int(h[1:], base=16)
+
+def is_int(x, base=10):
+    try:
+        int(x, base=base)
+    except ValueError:
+        return False
+    return True
+
+validators = {
+    'byr': lambda x: validate_int(x, 1920, 2002),
+    'iyr': lambda x: validate_int(x, 2010, 2020),
+    'eyr': lambda x: validate_int(x, 2020, 2030),
+    'hgt': lambda x: validate_height(x),
+    'hcl': lambda x: validate_hex(x),
+    'ecl': lambda x: x in ['amb', 'blu', 'brn', 'gry', 'grn', 'hzl', 'oth'],
+    'pid': lambda x: len(x) == 9 and is_int(x)
+    }
+
+
+def validate(entry, required_fields):
+    for field in required_fields:
+        if field not in entry or not validators[field](entry[field]):
+            return False
+
+    return True
+
+entries = [{}]
+index = 0
+with open("input") as f:
+    for line in f:
+        line = line.strip()
+        if not line:
+            entries.append({})
+            index = index + 1
+        else:
+            for entry in line.split(" "):
+                key, value = entry.split(":")
+                entries[index][key] = value
+
+required = ['byr', 'iyr', 'eyr', 'hgt', 'hcl', 'ecl', 'pid']
+print(list(map(lambda x: validate(x, required), entries)).count(True))