diff --git a/2021/data/day1.expected b/2021/data/day1.expected
new file mode 100644
index 0000000..79cb537
--- /dev/null
+++ b/2021/data/day1.expected
@@ -0,0 +1,2 @@
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diff --git a/2021/data/day1.input b/2021/data/day1.input
new file mode 100644
index 0000000..b3ee114
--- /dev/null
+++ b/2021/data/day1.input
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