3/4

3/3.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+
+from random import randrange
+import sys
+
+with open(sys.argv[1], 'r') as f:
+    L = f.readlines()
+L = [x.strip() for x in L]
+
+# part 1
+l = len(L)
+li = len(L[0])
+s = [3, 1]
+i = 0
+j = 0
+t = 0
+while i < l:
+    i += s[1]
+    j += s[0]
+    if i < l and L[i][j % li] == '#':
+        t += 1
+print(t)
+
+# part 2
+l = len(L)
+li = len(L[0])
+ss = [[1, 1], [3, 1], [5, 1], [7, 1], [1, 2]]
+t = 1
+for n in range(len(ss)):
+    s = ss[n]
+    i = 0
+    j = 0
+    tn = 0
+    while i < l:
+        i += s[1]
+        j += s[0]
+        if i < l and L[i][j % li] == '#':
+            tn += 1
+    t *= tn
+print(t)

3/input.txt

@@ -0,0 +1,323 @@
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4/4.py

@@ -0,0 +1,63 @@
+#!/usr/bin/env python3
+
+import re
+import sys
+
+L = []
+with open(sys.argv[1], 'r') as f:
+    L = f.readlines()
+L = [x.strip() for x in L]
+
+
+ACCEPTED_FIELDS = {'byr', 'iyr', 'eyr', 'hgt', 'hcl', 'ecl', 'pid'}
+
+
+# part 1
+j = 0
+people = [0]
+for i in L:
+    if i == '':
+        people.append(0)
+        continue
+    fields = i.split(' ')
+    for f in fields:
+        if f.split(':')[0] in ACCEPTED_FIELDS:
+            people[-1] += 1
+valid = 0
+for p in people:
+    if p == len(ACCEPTED_FIELDS):
+        valid += 1
+print(valid)
+
+# part 2
+VALID_ECL = {'amb', 'blu', 'brn', 'gry', 'grn', 'hzl', 'oth'}
+
+j = 0
+people = [{'valid': 0, 'byr': '', 'iyr': '', 'eyr': '', 'hgt': '', 'ecl': '', 'pid': ''}]
+for i in L:
+    if i == '':
+        people.append({'valid': 0, 'byr': '', 'iyr': '', 'eyr': '', 'hgt': '', 'ecl': '', 'pid': ''})
+        continue
+    fields = i.split(' ')
+    for f in fields:
+        if f.split(':')[0] in ACCEPTED_FIELDS:
+            people[-1]['valid'] += 1
+            people[-1][f.split(':')[0]] = f.split(':')[1]
+
+valid_people = []
+for p in people:
+    if p['valid'] == len(ACCEPTED_FIELDS):
+        valid_people.append(p)
+
+valid = 0
+for v in valid_people:
+    if v['byr'].isdigit() and int(v['byr']) >= 1920 and int(v['byr']) <= 2002 and \
+            v['iyr'].isdigit() and int(v['iyr']) >= 2010 and int(v['iyr']) <= 2020 and \
+            v['eyr'].isdigit() and int(v['eyr']) >= 2020 and int(v['eyr']) <= 2030 and \
+            ((v['hgt'].endswith('cm') and (int(v['hgt'].split('cm')[0]) >= 150 and int(v['hgt'].split('cm')[0]) <= 193)) or \
+             (v['hgt'].endswith('in') and (int(v['hgt'].split('in')[0]) >= 59  and int(v['hgt'].split('in')[0]) <= 76 ))) and \
+            (v['hcl'].startswith('#') and len(v['hcl'].split('#')[1]) == 6 and bool(re.match(r'^[0-9a-f]*$', v['hcl'].split('#')[1]))) and \
+        v['ecl'] in VALID_ECL and \
+        len(v['pid']) == 9 and bool(re.match(r'^[0-9]*$', v['pid'])):
+        valid += 1
+print(valid)