2018 day 2

.gitignore

@@ -1 +1,2 @@
 day*.txt
+venv/

2018/day2.py

@@ -0,0 +1,30 @@
+def main():
+    with open("day2.txt", "rt") as f:
+        lines = [line.rstrip() for line in f.readlines()]
+
+    n2 = 0
+    n3 = 0
+    for line in lines:
+        occurences = [line.count(letter) for letter in line]
+        if 2 in occurences:
+            n2 += 1
+        if 3 in occurences:
+            n3 += 1
+    print(n2 * n3)
+
+    for line in lines:
+        for other in lines:
+            diffs = 0
+            common = ""
+            for c1, c2 in zip(line, other):
+                if c1 == c2:
+                    common += c1
+                else:
+                    diffs += 1
+            if diffs == 1:
+                print(common)
+                return
+
+
+if __name__ == "__main__":
+    main()

2018/skel.py.txt

@@ -0,0 +1,7 @@
+def main():
+    with open("", "rt") as f:
+        lines = [line.rstrip() for line in f.readlines()]
+
+
+if __name__ == "__main__":
+    main()