From 5d8a6632209aee9478b36f63f66e7e64d7fc3469 Mon Sep 17 00:00:00 2001
From: Yasmine <yasmineahmedali1@gmail.com>
Date: Thu, 17 Jul 2025 22:02:58 +0300
Subject: [PATCH] Solution to the problem

---
 yasmine-ahmed.md | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 yasmine-ahmed.md

diff --git a/yasmine-ahmed.md b/yasmine-ahmed.md
new file mode 100644
index 0000000..d032cc9
--- /dev/null
+++ b/yasmine-ahmed.md
@@ -0,0 +1,11 @@
+```cpp
+#include <iostream>
+using namespace std;
+
+int main() {
+    long long n;
+    cin >> n;
+    cout << n * (n + 1) / 2 << endl;
+    return 0;
+}
+```