day 5 time tag and alternative solution

5/a_better.py

@@ -0,0 +1,43 @@
+from collections import defaultdict
+
+
+def myrange(x1, y1, x2, y2):
+    while True:
+        yield(x1, y1)
+        if x1 == x2 and y1 == y2:
+            return
+        if x1 != x2:
+            x1 += (1 if x1 <= x2 else -1)
+        if y1 != y2:
+            y1 += (1 if y1 <= y2 else -1)
+
+
+with open("input.txt") as f:
+    lines = [i.strip() for i in f.readlines()]
+
+
+points = defaultdict(lambda: 0)
+
+for line in lines:
+    p1, p2 = line.split(" -> ")
+
+    x1, y1 = p1.split(",")
+    x2, y2 = p2.split(",")
+
+    x1 = int(x1)
+    y1 = int(y1)
+    x2 = int(x2)
+    y2 = int(y2)
+
+    # removing this if condition will include diagonal lines, the requirement for part b
+    if x1 == x2 or y1 == y2:
+        for xr, yr in myrange(x1, y1, x2, y2):
+            points[(xr, yr)] += 1
+
+overlaps = 0
+
+for point, hits in points.items():
+    if hits > 1:
+        overlaps += 1
+
+print(overlaps)

5/b.py

@@ -49,3 +49,5 @@ for point, hits in points.items():
         overlaps += 1
 
 print(overlaps)
+
+# 26m