add: 230326-CN

cpp/2303/230326-CN.cpp

@@ -0,0 +1,24 @@
+#include <vector>
+#include <unordered_set>
+
+/**
+ * 2395. Find Subarrays With Equal Sum
+ *
+ * Given a 0-indexed integer array nums, determine whether there exist two subarrays of length 2 with equal sum. Note that the two subarrays must begin at different indices.
+ * Return true if these subarrays exist, and false otherwise.
+ * A subarray is a contiguous non-empty sequence of elements within an array.
+ */
+
+class Solution {
+public:
+	static bool findSubarrays(const std::vector<int>& nums) {
+		const int n = nums.size();
+		std::unordered_set<int> s;
+		for (int i = 1; i < n; ++i)
+			if (s.count(nums[i] + nums[i - 1]))
+				return true;
+			else
+				s.insert(nums[i] + nums[i - 1]);
+		return false;
+	}
+};

cpp/2303/CMakeLists.txt

@@ -3,4 +3,4 @@ PROJECT(2303)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2303 230325.cpp)
+ADD_EXECUTABLE(2303 230326-CN.cpp)