add: 220112-CN

2201/220112-CN.cpp

@@ -0,0 +1,32 @@
+#include <vector>
+
+/**
+ * 334. Increasing Triplet Subsequence
+ * Given an integer array nums, return true if there exists a triple of indices (i, j, k) such that i < j < k and nums[i] < nums[j] < nums[k]. If no such indices exists, return false.
+ */
+
+class Solution {
+public:
+	static bool increasingTriplet(const std::vector<int>& nums) {
+		int n = nums.size();
+		int overallMinimum = nums[0], solutionMinimum = nums[0], mid = 0x7FFFFFFF;
+		for (int i = 1; i < n; ++i) {
+			overallMinimum = std::min(overallMinimum, nums[i]);
+			if (nums[i] > mid) {
+				return true;
+			}
+			if (nums[i] > overallMinimum && nums[i] <= mid) {
+				solutionMinimum = overallMinimum;
+				mid = nums[i];
+			}
+			if (nums[i] > solutionMinimum && nums[i] < mid) {
+				mid = nums[i];
+			}
+		}
+		return false;
+	}
+};
+
+int main() {
+	return !Solution::increasingTriplet({2, 1, 5, 0, 4, 6});
+}

2201/CMakeLists.txt

@@ -3,4 +3,4 @@ PROJECT(2201)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2201 220111.cpp)
+ADD_EXECUTABLE(2201 220112-CN.cpp)