From 0811ea8e26c4f5fcfc45bf81432b3565d81aa7ba Mon Sep 17 00:00:00 2001
From: BangDori <qudwns8865@naver.com>
Date: Tue, 3 Jun 2025 10:03:05 +0900
Subject: [PATCH] =?UTF-8?q?[=EA=B0=95=EB=B3=91=EC=A4=80]=20Missing=20Numbe?=
 =?UTF-8?q?r?=
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---
 bangdori/268.js | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 bangdori/268.js

diff --git a/bangdori/268.js b/bangdori/268.js
new file mode 100644
index 0000000..177907d
--- /dev/null
+++ b/bangdori/268.js
@@ -0,0 +1,11 @@
+/**
+ * @param {number[]} nums
+ * @return {number}
+ */
+var missingNumber = function (nums) {
+  const n = nums.length;
+  const original = (n * (n + 1)) / 2;
+  const result = nums.reduce((acc, curr) => acc + curr, 0);
+
+  return original - result;
+};