diff --git a/2024/day-10/day10.test.ts b/2024/day-10/day10.test.ts
new file mode 100644
index 0000000..4fb6820
--- /dev/null
+++ b/2024/day-10/day10.test.ts
@@ -0,0 +1,40 @@
+import { expect, test } from "bun:test";
+import * as path from "node:path";
+import { part1, part2 } from "./day10.ts";
+
+test("day 10, part 1", async () => {
+	const testInput = await Bun.file(
+		path.resolve(__dirname, "test-input.txt"),
+	).text();
+	const input = await Bun.file(path.resolve(__dirname, "input.txt")).text();
+
+	console.log("\n\n");
+
+	// const testResult = part1(testInput);
+	// console.log("Test data:", testResult);
+	// expect(testResult).toEqual(36);
+
+	const finalResult = part1(input);
+	console.log("Full data:", finalResult);
+	expect(finalResult).toEqual(682);
+
+	console.log("\n\n");
+});
+
+test("day 10, part 2", async () => {
+	const testInput = await Bun.file(
+		path.resolve(__dirname, "test-input.txt"),
+	).text();
+	const input = await Bun.file(path.resolve(__dirname, "input.txt")).text();
+
+	const testResult = part2(testInput);
+	console.log("\n\n");
+	console.log("Test data:", testResult);
+	expect(testResult).toEqual(81);
+
+	const finalResult = part2(input);
+	console.log("Full data:", finalResult);
+	expect(finalResult).toEqual(1511);
+
+	console.log("\n\n");
+});
diff --git a/2024/day-10/day10.ts b/2024/day-10/day10.ts
new file mode 100644
index 0000000..8997a70
--- /dev/null
+++ b/2024/day-10/day10.ts
@@ -0,0 +1,127 @@
+export function part1(input: string) {
+	let final = 0;
+
+	const trailheads = [];
+	const lines = input.split("\n");
+	const grid = lines.map((l) => l.split("").map(Number));
+	for (let i = 0; i < lines.length; i++) {
+		const line = lines[i];
+		const heights = line.split("").map(Number);
+		for (let j = 0; j < heights.length; j++) {
+			const height = heights[j];
+			if (height === 0) {
+				trailheads.push([i, j]);
+			}
+		}
+	}
+
+	for (const th of trailheads) {
+		const [x, y] = th;
+		const finalPointsReached = [];
+		function foo(path: [number, number][]) {
+			if (path.length === 10) {
+				finalPointsReached.push(path.at(-1));
+				return;
+			}
+			const current = path.at(-1);
+			const currentHeight = path.length - 1;
+
+			if (!current) {
+				throw new Error("must have at least one element");
+			}
+			const prev = path.at(-2);
+			const [pX, pY] = prev ?? [];
+			const [cX, cY] = current;
+			const up = grid[cX - 1]?.[cY];
+			const down = grid[cX + 1]?.[cY];
+			const right = grid[cX]?.[cY + 1];
+			const left = grid[cX]?.[cY - 1];
+			const isPrevUp = pX === cX - 1 && pY === cY;
+			const isPrevDown = pX === cX + 1 && pY === cY;
+			const isPrevRight = pX === cX && pY === cY + 1;
+			const isPrevLeft = pX === cX && pY === cY - 1;
+			if (!isPrevUp && up === currentHeight + 1) {
+				foo([...path, [cX - 1, cY]]);
+			}
+			if (!isPrevDown && down === currentHeight + 1) {
+				foo([...path, [cX + 1, cY]]);
+			}
+			if (!isPrevRight && right === currentHeight + 1) {
+				foo([...path, [cX, cY + 1]]);
+			}
+			if (!isPrevLeft && left === currentHeight + 1) {
+				foo([...path, [cX, cY - 1]]);
+			}
+		}
+		foo([th]);
+		const uniqueFinalPoints = [
+			...new Set(finalPointsReached.map((x) => x.join(","))),
+		].map((x) => x.split(","));
+		final += uniqueFinalPoints.length;
+	}
+	return final;
+}
+export function part2(input: string) {
+	let final = 0;
+
+	const trailheads = [];
+	const lines = input.split("\n");
+	const grid = lines.map((l) => l.split("").map(Number));
+	for (let i = 0; i < lines.length; i++) {
+		const line = lines[i];
+		const heights = line.split("").map(Number);
+		for (let j = 0; j < heights.length; j++) {
+			const height = heights[j];
+			if (height === 0) {
+				trailheads.push([i, j]);
+			}
+		}
+	}
+
+	for (const th of trailheads) {
+		const [x, y] = th;
+		function foo(path: [number, number][]) {
+			if (path.length === 10) {
+				final++;
+				return;
+			}
+			const current = path.at(-1);
+			const currentHeight = path.length - 1;
+
+			if (!current) {
+				throw new Error("must have at least one element");
+			}
+			const prev = path.at(-2);
+			const [pX, pY] = prev ?? [];
+			const [cX, cY] = current;
+			const up = grid[cX - 1]?.[cY];
+			const down = grid[cX + 1]?.[cY];
+			const right = grid[cX]?.[cY + 1];
+			const left = grid[cX]?.[cY - 1];
+			const isPrevUp = pX === cX - 1 && pY === cY;
+			const isPrevDown = pX === cX + 1 && pY === cY;
+			const isPrevRight = pX === cX && pY === cY + 1;
+			const isPrevLeft = pX === cX && pY === cY - 1;
+			if (!isPrevUp && up === currentHeight + 1) {
+				foo([...path, [cX - 1, cY]]);
+			}
+			if (!isPrevDown && down === currentHeight + 1) {
+				foo([...path, [cX + 1, cY]]);
+			}
+			if (!isPrevRight && right === currentHeight + 1) {
+				foo([...path, [cX, cY + 1]]);
+			}
+			if (!isPrevLeft && left === currentHeight + 1) {
+				foo([...path, [cX, cY - 1]]);
+			}
+		}
+		foo([th]);
+	}
+	return final;
+}
+
+function logLines(arr: Array<unknown>) {
+	for (const x of arr) {
+		console.log(x);
+	}
+}
diff --git a/2024/day-10/input.txt b/2024/day-10/input.txt
new file mode 100644
index 0000000..f28b5fe
--- /dev/null
+++ b/2024/day-10/input.txt
@@ -0,0 +1,54 @@
+034565433432321821235456556798712438943432345432101010
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+234300149854078980365432101487217898721032349810120123
\ No newline at end of file
diff --git a/2024/day-10/test-input.txt b/2024/day-10/test-input.txt
new file mode 100644
index 0000000..7bb1248
--- /dev/null
+++ b/2024/day-10/test-input.txt
@@ -0,0 +1,8 @@
+89010123
+78121874
+87430965
+96549874
+45678903
+32019012
+01329801
+10456732
\ No newline at end of file