diff --git a/py/2015/03/solve.py b/py/2015/03/solve.py
deleted file mode 100644
index db9cf5e..0000000
--- a/py/2015/03/solve.py
+++ /dev/null
@@ -1,47 +0,0 @@
-import sys
-
-def load_steps(filename):
-	with open(filename, "r") as f:
-		return f.read()[:-1]
-
-# PART 1
-
-def find_doubles(steps):
-	x, y = 0, 0
-	houses = {(0, 0)}
-	for step in steps:
-		if   step == "^": y += 1
-		elif step == "v": y -= 1
-		elif step == "<": x -= 1
-		elif step == ">": x += 1
-		houses.add((x, y))
-	return houses
-
-# PART 2
-
-def split_string(s):
-	s1 = ""
-	s2 = ""
-	while True:
-		if not s: break
-		s1 += s[0]
-		s = s[1:]
-		if not s: break
-		s2 += s[0]
-		s = s[1:]
-	return s1, s2
-
-def main(filename):
-	steps = load_steps(filename)
-	print(f"Solutions for {filename}")
-	doubles = len(find_doubles(steps))
-	print(f"Part 1: {doubles}")
-	santa, robot = split_string(steps)
-	santa_doubles = find_doubles(santa)
-	robot_doubles = find_doubles(robot)
-	doubles_2 = len(santa_doubles | robot_doubles)
-	print(f"Part 2: {doubles_2}")
-
-if __name__ == "__main__":
-	for filename in sys.argv[1:]:
-		main(filename)
diff --git a/py/aoc/__init__.py b/py/aoc/__init__.py
index 9e972f6..d719098 100644
--- a/py/aoc/__init__.py
+++ b/py/aoc/__init__.py
@@ -2,7 +2,7 @@ import sys
 import argparse
 from pathlib import Path
 
-from .y2015 import d01, d02
+from .y2015 import d01, d02, d03
 from .y2016 import d01, d02, d03, d04, d05
 from .y2017 import d01, d02, d03, d04, d05, d06, d07, d08, d09
 from .y2018 import d01, d02, d03, d04, d05, d06, d07, d08, d09, d10, d11
@@ -13,6 +13,7 @@ from .y2022 import d01, d02, d03, d04, d05, d06
 DAYS = {
     "2015_01": y2015.d01.solve,
     "2015_02": y2015.d02.solve,
+    "2015_03": y2015.d03.solve,
     "2016_01": y2016.d01.solve,
     "2016_02": y2016.d02.solve,
     "2016_03": y2016.d03.solve,
diff --git a/py/aoc/y2015/d03.py b/py/aoc/y2015/d03.py
new file mode 100644
index 0000000..79b52ba
--- /dev/null
+++ b/py/aoc/y2015/d03.py
@@ -0,0 +1,46 @@
+# PART 1
+
+
+def find_doubles(steps):
+    x, y = 0, 0
+    houses = {(0, 0)}
+    for step in steps:
+        if step == "^":
+            y += 1
+        elif step == "v":
+            y -= 1
+        elif step == "<":
+            x -= 1
+        elif step == ">":
+            x += 1
+        houses.add((x, y))
+    return houses
+
+
+# PART 2
+
+
+def split_string(s):
+    s1 = ""
+    s2 = ""
+    while True:
+        if not s:
+            break
+        s1 += s[0]
+        s = s[1:]
+        if not s:
+            break
+        s2 += s[0]
+        s = s[1:]
+    return s1, s2
+
+
+def solve(inputstr):
+    steps = inputstr.strip()
+    doubles = len(find_doubles(steps))
+    print(f"Part 1: {doubles}")
+    santa, robot = split_string(steps)
+    santa_doubles = find_doubles(santa)
+    robot_doubles = find_doubles(robot)
+    doubles_2 = len(santa_doubles | robot_doubles)
+    print(f"Part 2: {doubles_2}")