From b9cac8afc4eea8c0b5a8235c75c3789d57189548 Mon Sep 17 00:00:00 2001
From: Ren Baoshuo <i@baoshuo.ren>
Date: Mon, 20 Sep 2021 20:03:58 +0800
Subject: [PATCH] =?UTF-8?q?891.=20Nim=E6=B8=B8=E6=88=8F?=
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https://www.acwing.com/problem/content/submission/code_detail/7830890/
---
 AcWing/891/891.cpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 AcWing/891/891.cpp

diff --git a/AcWing/891/891.cpp b/AcWing/891/891.cpp
new file mode 100644
index 00000000..f05ce04c
--- /dev/null
+++ b/AcWing/891/891.cpp
@@ -0,0 +1,15 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int n, r, a;
+
+int main() {
+    cin >> n;
+    while (n--) {
+        cin >> a;
+        r ^= a;
+    }
+    cout << (r ? "Yes" : "No") << endl;
+    return 0;
+}