diff --git a/runall.sh b/runall.sh
new file mode 100755
index 0000000..40ba5fb
--- /dev/null
+++ b/runall.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+
+rundir()
+{
+	if hash pypy &> /dev/null; then
+		python=pypy
+	else
+		python=python
+	fi
+
+	input=""
+	if [ -f $1/input.txt ]; then
+		input="$1/input.txt"
+	fi
+
+	for i in $1/*.py; do
+		echo "$i" "$input"
+		$python "$i" "$input"
+	done
+}
+
+for i in day-*; do
+	rundir $i
+done