From aba7f11c01da6c3b4fe30993e79f73ce7986b79d Mon Sep 17 00:00:00 2001
From: Baoshuo <i@baoshuo.ren>
Date: Thu, 5 Nov 2020 19:10:00 +0800
Subject: [PATCH] =?UTF-8?q?720.=20=E8=BF=9E=E7=BB=AD=E6=95=B4=E6=95=B0?=
 =?UTF-8?q?=E7=9B=B8=E5=8A=A0?=
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https://www.acwing.com/problem/content/submission/code_detail/2846068/
---
 AcWing/720/720.cpp | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 AcWing/720/720.cpp

diff --git a/AcWing/720/720.cpp b/AcWing/720/720.cpp
new file mode 100644
index 00000000..84a40f48
--- /dev/null
+++ b/AcWing/720/720.cpp
@@ -0,0 +1,19 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int a, n, ans;
+
+int main() {
+    cin >> a;
+
+    while (cin >> n, n <= 0) {}
+
+    for (int i = 0; i < n; i++) {
+        ans += i + a;
+    }
+
+    cout << ans << endl;
+
+    return 0;
+}