diff --git a/.aocrunner.json b/.aocrunner.json
index 8c1a5e5..0d00669 100644
--- a/.aocrunner.json
+++ b/.aocrunner.json
@@ -33,10 +33,10 @@
     },
     {
       "part1": {
-        "solved": false,
-        "result": null,
+        "solved": true,
+        "result": "539590",
         "attempts": [],
-        "time": null
+        "time": 2.532209
       },
       "part2": {
         "solved": false,
diff --git a/README.md b/README.md
index 69e5b0a..478bc67 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@
 
 [![Day](https://badgen.net/badge/01/%E2%98%85%E2%98%85/green)](src/day01)
 [![Day](https://badgen.net/badge/02/%E2%98%85%E2%98%85/green)](src/day02)
-![Day](https://badgen.net/badge/03/%E2%98%86%E2%98%86/gray)
+[![Day](https://badgen.net/badge/03/%E2%98%85%E2%98%86/yellow)](src/day03)
 ![Day](https://badgen.net/badge/04/%E2%98%86%E2%98%86/gray)
 ![Day](https://badgen.net/badge/05/%E2%98%86%E2%98%86/gray)
 ![Day](https://badgen.net/badge/06/%E2%98%86%E2%98%86/gray)
@@ -83,9 +83,9 @@ Both parts: 1.293ms
 
 ```
 Day 03
-Time part 1: -
+Time part 1: 2.529ms
 Time part 2: -
-Both parts: -
+Both parts: 2.529ms
 ```
 
 ```
@@ -243,8 +243,8 @@ Both parts: -
 ```
 
 ```
-Total stars: 4/50
-Total time: 3.173ms
+Total stars: 5/50
+Total time: 5.703ms
 ```
 
 <!--/RESULTS-->
diff --git a/src/day03/README.md b/src/day03/README.md
new file mode 100644
index 0000000..6531ae4
--- /dev/null
+++ b/src/day03/README.md
@@ -0,0 +1,9 @@
+# 🎄 Advent of Code 2023 - day 3 🎄
+
+## Info
+
+Task description: [link](https://adventofcode.com/2023/day/3)
+
+## Notes
+
+...
\ No newline at end of file
diff --git a/src/day03/index.ts b/src/day03/index.ts
new file mode 100644
index 0000000..927b61b
--- /dev/null
+++ b/src/day03/index.ts
@@ -0,0 +1,95 @@
+import run from "aocrunner"
+
+const parseInput = (rawInput: string) => rawInput.split("\n")
+
+const part1 = (rawInput: string) => {
+  const input = parseInput(rawInput)
+  let total = 0
+  input.forEach((line, row) => {
+    let numString = ""
+    line.split("").forEach((char, col) => {
+      if (/\d/.test(char)) {
+        numString += char
+      }
+      if (!/\d/.test(line[col + 1] ?? "")) {
+        // time to test current string
+        if (numString === "") {
+          return
+        }
+        for (
+          let r = Math.max(row - 1, 0);
+          r <= Math.min(row + 1, input.length - 1);
+          r++
+        ) {
+          for (
+            let c = Math.max(col - numString.length, 0);
+            c <= Math.min(col + 1, line.length - 1);
+            c++
+          ) {
+            if (!/\d|\./.test(input[r].charAt(c))) {
+              total += parseInt(numString)
+              numString = ""
+              return // done with this char
+            }
+          }
+        }
+        numString = ""
+      }
+    })
+  })
+  return total
+}
+
+const part2 = (rawInput: string) => {
+  const input = parseInput(rawInput)
+  input.forEach((line, row) => {
+    line.split("").forEach((char, col) => {
+      if (char === "*") {
+        // ask every found number if it touches a star
+        // add to total the product of all the pairs
+      }
+    })
+  })
+  return
+}
+
+run({
+  part1: {
+    tests: [
+      {
+        input: `467..114..
+...*......
+..35..633.
+......#...
+617*......
+.....+.58.
+..592.....
+......755.
+...$.*....
+.664.598..`,
+        expected: 4361,
+      },
+    ],
+    solution: part1,
+  },
+  part2: {
+    tests: [
+      {
+        input: `467..114..
+...*......
+..35..633.
+......#...
+617*......
+.....+.58.
+..592.....
+......755.
+...$.*....
+.664.598..`,
+        expected: 467835,
+      },
+    ],
+    solution: part2,
+  },
+  trimTestInputs: true,
+  onlyTests: false,
+})