diff --git a/2018/d01/ex1/ex1.py b/2018/d01/ex1/ex1.py
new file mode 100755
index 0000000..bcffca7
--- /dev/null
+++ b/2018/d01/ex1/ex1.py
@@ -0,0 +1,20 @@
+#!/usr/bin/env python
+
+import sys
+
+
+def solve(input: str) -> int:
+    def parse(input: list[str]) -> list[int]:
+        return [int(n) for n in input]
+
+    deltas = parse(input.splitlines())
+    return sum(deltas)
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()