diff --git a/index.js b/index.js
index 0f4b28b4..eb58fd31 100644
--- a/index.js
+++ b/index.js
@@ -1,17 +1,49 @@
 class SortedList {
-  constructor() {}
+	constructor() {
+		this.items = [];
+		this.length = 0;
+	}
 
-  add(item) {}
+	add(item) {
+		this.items.push(item);
+		this.items.sort((a, b) => a - b);
+		this.length = this.items.length;
+	}
 
-  get(pos) {}
+	get(pos) {
+		if (pos < 0 || pos >= this.length) {
+			throw new Error("OutOfBounds");
+		}
 
-  max() {}
+		return this.items[pos];
+	}
 
-  min() {}
+	max() {
+		if (this.length === 0) {
+			throw new Error("EmptySortedList");
+		}
+		return this.items[this.length - 1];
+	}
 
-  sum() {}
+	min() {
+		if (this.length === 0) {
+			throw new Error("EmptySortedList");
+		}
+		return this.items[0];
+	}
 
-  avg() {}
+	sum() {
+		return this.items.reduce((acc, curr) => acc + curr, 0);
+	}
+
+	avg() {
+		if (this.length === 0) {
+			throw new Error("EmptySortedList");
+		}
+		return this.sum() / this.length;
+	}
 }
 
+const newObject = new SortedList();
+
 module.exports = SortedList;