Import from Nextcloud

01/01.py

@@ -0,0 +1,14 @@
+from itertools import combinations
+
+with open('01-input') as f:
+    numbers = {int(row.strip()) for row in f}
+
+for n in numbers:
+    if 2020-n in numbers:
+        print(n*(2020-n))
+
+
+for a,b,c in combinations(numbers, 3):
+    if a+b+c==2020:
+        print(a*b*c)
+

01/input

@@ -0,0 +1,200 @@
+1757
+1890
+1750
+1440
+1822
+1957
+2005
+1979
+1405
+2003
+1997
+1741
+1494
+1780
+1774
+1813
+447
+1429
+1990
+1767
+1969
+1787
+1944
+1863
+1778
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+611
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+1594
+1928
+1856
+1903
+1871
+1836
+1847
+1956
+1915
+1870
+1875
+1892
+276
+1896
+1945
+1821
+1947
+1898
+1802
+1853
+1895
+1790
+1819
+1980
+1832
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+1975

02/02.py

@@ -0,0 +1,25 @@
+import re
+
+with open('02-input') as f:
+    passwords = [row.strip() for row in f]
+
+pattern = re.compile(r'(\d*)-(\d*) (\w): (.*)')
+count = 0
+for p in passwords:
+    if m := pattern.match(p):
+        n1, n2, l, p = m.groups()
+        c = p.count(l)
+        if int(n1)<=c<=int(n2):
+            count += 1
+
+print(count)
+
+count = 0
+for p in passwords:
+    if m := pattern.match(p):
+        n1, n2, l, p = m.groups()
+        n1, n2 = int(n1)-1, int(n2)-1
+        if p[n1]==l and p[n2]!=l or p[n1]!=l and p[n2]==l:
+            count += 1
+
+print(count)

03/03.py

@@ -0,0 +1,29 @@
+import re
+
+with open('03-input') as f:
+    landscape = [row.strip() for row in f]
+
+count = 0
+i, j = 0, 0
+l = len(landscape[0])
+while i<len(landscape):
+    if landscape[i][j]=='#':
+        count += 1
+    i += 1
+    j = (j+3)%l
+print(count)
+
+counts = []
+for dx, dy in [(1,1), (3,1), (5,1), (7,1), (1, 2)]:
+    count = 0
+    i, j = 0, 0
+    l = len(landscape[0])
+    while i<len(landscape):
+        if landscape[i][j]=='#':
+            count += 1
+        i += dy
+        j = (j+dx)%l
+    counts.append(count)
+
+from math import prod
+print(prod(counts))

03/input

@@ -0,0 +1,323 @@
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04/04.py

@@ -0,0 +1,23 @@
+import re
+
+with open('04-input') as f:
+    text = f.read()
+
+while '\n\n\n' in text:
+    text = text.replace('\n\n\n', '\n\n')
+passports = text.split('\n\n')
+passports = [dict(kv.split(':') for kv in p.replace('\n\n', ' ').split()) for p in passports]
+valid = { 'byr', 'iyr', 'eyr', 'hgt', 'hcl', 'ecl', 'pid', }
+print(sum(1 for p in passports if valid.issubset(p.keys())))
+
+from functools import partial
+def int_val(least, most, n):
+    return least<=n<=most
+v_byr = partial(int_val, 1920, 2002)
+v_iyr = partial(int_val, 2010, 2020)
+v_eyr = partial(int_val, 2020, 2030)
+v_cm = partial(int_val, 150, 193)
+v_in = partial(int_val, 59, 76)
+
+def is_valid(passport):
+    valid.issubset(p.keys())

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2021 Fedor Lyanguzov
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -0,0 +1,2 @@
+# aoc_2020_python
+Advent of Code 2020 in Python https://adventofcode.com/2020