From 35ed69f23a0ca950c0bd27ab0ccd540644177e9b Mon Sep 17 00:00:00 2001
From: Baoshuo <i@baoshuo.ren>
Date: Mon, 9 May 2022 19:18:32 +0800
Subject: [PATCH] =?UTF-8?q?819.=20=E9=80=92=E5=BD=92=E6=B1=82=E9=98=B6?=
 =?UTF-8?q?=E4=B9=98?=
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https://www.acwing.com/problem/content/submission/code_detail/14063914/
---
 AcWing/819/819.cpp | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 AcWing/819/819.cpp

diff --git a/AcWing/819/819.cpp b/AcWing/819/819.cpp
new file mode 100644
index 00000000..ea7655c6
--- /dev/null
+++ b/AcWing/819/819.cpp
@@ -0,0 +1,20 @@
+#include <iostream>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+int f(int x) {
+    return x == 1 ? 1 : x * f(x - 1);
+}
+
+int n;
+
+int main() {
+    std::ios::sync_with_stdio(false);
+
+    cin >> n;
+    cout << f(n) << endl;
+
+    return 0;
+}