diff --git a/.vim/coc-settings.json b/.vim/coc-settings.json
new file mode 100644
index 0000000..a81fc3c
--- /dev/null
+++ b/.vim/coc-settings.json
@@ -0,0 +1,10 @@
+{
+  "deno.enable": true,
+  "deno.lint": true,
+  "deno.unstable": true,
+  "prettier.disableLanguages": [
+    "typescript",
+    "javascript"
+  ],
+  "tsserver.enable": false
+}
\ No newline at end of file
diff --git a/2021/.gitignore b/2021/.gitignore
new file mode 100644
index 0000000..63ff173
--- /dev/null
+++ b/2021/.gitignore
@@ -0,0 +1 @@
+*.input
diff --git a/2021/1.ts b/2021/1.ts
new file mode 100644
index 0000000..b5e4b69
--- /dev/null
+++ b/2021/1.ts
@@ -0,0 +1,11 @@
+import { readLines } from "./deps.ts";
+
+// Day 1
+let increases = 0;
+let lastDepth = Number.MAX_VALUE;
+for await (const depthString of readLines(await Deno.open("1.input"))) {
+  const depth = parseInt(depthString);
+  if (depth > lastDepth) increases++;
+  lastDepth = depth;
+}
+console.log("Number of depth increases:", increases);
diff --git a/2021/deps.ts b/2021/deps.ts
new file mode 100644
index 0000000..64ea606
--- /dev/null
+++ b/2021/deps.ts
@@ -0,0 +1 @@
+export { readLines } from "https://deno.land/std@0.116.0/io/mod.ts";