From cda0903ae35d1f0f53299fe90882898312e19420 Mon Sep 17 00:00:00 2001
From: tbouri <tbouri@andrew.cmu.edu>
Date: Sun, 31 Aug 2025 15:58:09 +0300
Subject: [PATCH 1/5] Fix the issue in fib file

---
 src/fib.ts | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/fib.ts b/src/fib.ts
index 8dc8ddd..4475aa6 100644
--- a/src/fib.ts
+++ b/src/fib.ts
@@ -1,12 +1,12 @@
 // util function that computes the fibonacci numbers
-module.exports = function fibonacci(n) {
+export function fibonacci(n: number): number {
   if (n < 0) {
     return -1;
-  } else if (n == 0) {
+  } else if (n === 0) {
     return 0;
-  } else if (n == 1) {
+  } else if (n === 1) {
     return 1;
   }
 
   return fibonacci(n - 1) + fibonacci(n - 2);
-};
+}

From d85eb1d1bb8e75b44d377a59a60f71c82dfe45c0 Mon Sep 17 00:00:00 2001
From: tbouri <tbouri@andrew.cmu.edu>
Date: Sun, 31 Aug 2025 16:17:25 +0300
Subject: [PATCH 2/5] Fix fibRoute.ts file

---
 src/fibRoute.ts | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/fibRoute.ts b/src/fibRoute.ts
index 2d41ca5..19c7600 100644
--- a/src/fibRoute.ts
+++ b/src/fibRoute.ts
@@ -1,6 +1,5 @@
 // Endpoint for querying the fibonacci numbers
-
-const fibonacci = require("./fib");
+import { fibonacci } from "./fib";
 
 export default (req, res) => {
   const { num } = req.params;

From 800541850c85fda280533d55a98858ad2d5e4416 Mon Sep 17 00:00:00 2001
From: tbouri <tbouri@andrew.cmu.edu>
Date: Sun, 31 Aug 2025 22:39:51 +0300
Subject: [PATCH 3/5] Fix on code for fib.ts file

---
 src/fib.ts | 23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/src/fib.ts b/src/fib.ts
index 4475aa6..3d68b3e 100644
--- a/src/fib.ts
+++ b/src/fib.ts
@@ -1,12 +1,15 @@
-// util function that computes the fibonacci numbers
+// src/fib.ts
 export function fibonacci(n: number): number {
-  if (n < 0) {
-    return -1;
-  } else if (n === 0) {
-    return 0;
-  } else if (n === 1) {
-    return 1;
-  }
+  if (n < 0) return -1;
+  if (n === 0) return 0;
+  if (n === 1) return 1;
 
-  return fibonacci(n - 1) + fibonacci(n - 2);
-}
+  let a = 0;
+  let b = 1;
+  for (let i = 2; i <= n; i++) {
+    const next = a + b;
+    a = b;
+    b = next;
+  }
+  return b;
+}
\ No newline at end of file

From d92c249479c0b30cb8ec4d2ffad63bd2e1035469 Mon Sep 17 00:00:00 2001
From: tbouri <tbouri@andrew.cmu.edu>
Date: Sun, 31 Aug 2025 22:49:51 +0300
Subject: [PATCH 4/5] Fixed error in fibRoute.ts

---
 src/fibRoute.ts | 25 ++++++++++++++++++-------
 1 file changed, 18 insertions(+), 7 deletions(-)

diff --git a/src/fibRoute.ts b/src/fibRoute.ts
index 19c7600..5e7510e 100644
--- a/src/fibRoute.ts
+++ b/src/fibRoute.ts
@@ -1,15 +1,26 @@
 // Endpoint for querying the fibonacci numbers
+import type { Request, Response } from "express";
 import { fibonacci } from "./fib";
 
-export default (req, res) => {
-  const { num } = req.params;
+export default function fibRoute(req: Request, res: Response): void {
+  const numParam: string | undefined = req.params?.num;
 
-  const fibN = fibonacci(parseInt(num));
-  let result = `fibonacci(${num}) is ${fibN}`;
+  if (typeof numParam !== "string") {
+    res.status(400).send("Missing route parameter 'num'");
+    return;
+  }
 
-  if (fibN < 0) {
-    result = `fibonacci(${num}) is undefined`;
+  const n = Number.parseInt(numParam, 10);
+  if (Number.isNaN(n)) {
+    res.status(400).send(`Invalid number: "${numParam}"`);
+    return;
   }
 
+  const fibN = fibonacci(n);
+  const result =
+    fibN < 0
+      ? `fibonacci(${n}) is undefined`
+      : `fibonacci(${n}) is ${fibN}`;
+
   res.send(result);
-};
+}

From 4a2065fd0a08eee50a5d9bca2828a322d82ca11a Mon Sep 17 00:00:00 2001
From: tbouri <tbouri@andrew.cmu.edu>
Date: Sun, 31 Aug 2025 23:22:26 +0300
Subject: [PATCH 5/5] Trying again

---
 src/fibRoute.ts | 25 +++++++------------------
 1 file changed, 7 insertions(+), 18 deletions(-)

diff --git a/src/fibRoute.ts b/src/fibRoute.ts
index 5e7510e..19c7600 100644
--- a/src/fibRoute.ts
+++ b/src/fibRoute.ts
@@ -1,26 +1,15 @@
 // Endpoint for querying the fibonacci numbers
-import type { Request, Response } from "express";
 import { fibonacci } from "./fib";
 
-export default function fibRoute(req: Request, res: Response): void {
-  const numParam: string | undefined = req.params?.num;
+export default (req, res) => {
+  const { num } = req.params;
 
-  if (typeof numParam !== "string") {
-    res.status(400).send("Missing route parameter 'num'");
-    return;
-  }
+  const fibN = fibonacci(parseInt(num));
+  let result = `fibonacci(${num}) is ${fibN}`;
 
-  const n = Number.parseInt(numParam, 10);
-  if (Number.isNaN(n)) {
-    res.status(400).send(`Invalid number: "${numParam}"`);
-    return;
+  if (fibN < 0) {
+    result = `fibonacci(${num}) is undefined`;
   }
 
-  const fibN = fibonacci(n);
-  const result =
-    fibN < 0
-      ? `fibonacci(${n}) is undefined`
-      : `fibonacci(${n}) is ${fibN}`;
-
   res.send(result);
-}
+};