From e112f8c395045b1fc374203120a2544918cba81a Mon Sep 17 00:00:00 2001
From: Eat-Swap <root@eatswap.org>
Date: Sat, 28 May 2022 12:50:40 +0800
Subject: [PATCH] add: 220528 [cpp]

---
 cpp/2205/220528.cpp     | 16 ++++++++++++++++
 cpp/2205/CMakeLists.txt |  2 +-
 2 files changed, 17 insertions(+), 1 deletion(-)
 create mode 100644 cpp/2205/220528.cpp

diff --git a/cpp/2205/220528.cpp b/cpp/2205/220528.cpp
new file mode 100644
index 0000000..a64f2b1
--- /dev/null
+++ b/cpp/2205/220528.cpp
@@ -0,0 +1,16 @@
+#include <vector>
+
+/**
+ * 268. Missing Number
+ * Given an array nums containing n distinct numbers in the range [0, n], return the only number in the range that is missing from the array.
+ */
+
+class Solution {
+public:
+	int missingNumber(const std::vector<int>& nums) {
+		int ans = 0;
+		for (int i = 1; i <= nums.size(); ++i)
+			ans ^= i ^ nums[i - 1];
+		return ans;
+	}
+};
diff --git a/cpp/2205/CMakeLists.txt b/cpp/2205/CMakeLists.txt
index 6fafc44..b8cf7ea 100644
--- a/cpp/2205/CMakeLists.txt
+++ b/cpp/2205/CMakeLists.txt
@@ -3,4 +3,4 @@ PROJECT(2205)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2205 220527.cpp)
+ADD_EXECUTABLE(2205 220528.cpp)