diff --git a/deno.json b/deno.json
index e6a95e9..6b4eaa3 100644
--- a/deno.json
+++ b/deno.json
@@ -27,6 +27,7 @@
   "tasks": {
     "Day01": "cd ./src/01_Calories && deno run --allow-read=./input.txt Calories.ts",
     "Day02": "cd ./src/02_RockPaperScissors && deno run --allow-read=./input.txt RockPaperScissors.ts",
-    "Day03": "cd ./src/03_RucksackReorganization && deno run --allow-read=./input.txt RucksackReorganization.ts"
+    "Day03": "cd ./src/03_RucksackReorganization && deno run --allow-read=./input.txt RucksackReorganization.ts",
+    "Day04": "cd ./src/04_CampCleanup && deno run --allow-read=./input.txt CampCleanup.ts"
   }
 }
diff --git a/src/04_CampCleanup/CampCleanup.ts b/src/04_CampCleanup/CampCleanup.ts
new file mode 100644
index 0000000..94d5ff0
--- /dev/null
+++ b/src/04_CampCleanup/CampCleanup.ts
@@ -0,0 +1,30 @@
+const input = Deno.readTextFileSync('./input.txt').trimEnd().split('\n');
+
+function includes(left: [number, number], right: [number, number]): number {
+  if (
+    (left[0] <= right[0] && left[1] >= right[1]) ||
+    (left[0] >= right[0] && left[1] <= right[1])
+  ) {
+    return 1;
+  }
+  return 0;
+}
+
+function overlap(left: [number, number], right: [number, number]): number {
+  if (left[0] > right[1] || left[1] < right[0]) return 0;
+  return 1;
+}
+
+let includeScore = 0;
+let overlapScore = 0;
+for (const line of input) {
+  const sections = line.match(/^(\d+)-(\d+),(\d+)-(\d+)$/)!.splice(1);
+  const [startLeft, endLeft, startRight, endRight] = sections.map((id) => {
+    return parseInt(id);
+  }) as [number, number, number, number];
+  includeScore += includes([startLeft, endLeft], [startRight, endRight]);
+  overlapScore += overlap([startLeft, endLeft], [startRight, endRight]);
+}
+
+console.log(includeScore);
+console.log(overlapScore);
diff --git a/src/04_CampCleanup/input.txt b/src/04_CampCleanup/input.txt
new file mode 100644
index 0000000..fc3c167
--- /dev/null
+++ b/src/04_CampCleanup/input.txt
@@ -0,0 +1,1000 @@
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