add: 220524 [cpp]

cpp/2205/220524.cpp

@@ -0,0 +1,32 @@
+#include <stack>
+#include <string>
+#include <iostream>
+
+/**
+ * 32. Longest Valid Parentheses
+ * Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring.
+ */
+
+class Solution {
+public:
+	static int longestValidParentheses(const std::string& s) {
+		std::stack<int16_t> stack;
+		int16_t last_success = -1;
+		const int16_t len = s.length();
+
+		int ans = 0;
+		for (int16_t i = 0; i < len; ++i)
+			if ('(' == s[i])
+				stack.push(i);
+			else if (stack.empty())
+				last_success = i;
+			else
+				ans = std::max(ans, i - ((stack.pop(), stack.empty()) ? last_success : stack.top()));
+		return ans;
+	}
+};
+
+int main() {
+	std::cout << Solution::longestValidParentheses(")()(((()()()))))()()()");
+	return 0;
+}

cpp/2205/CMakeLists.txt

@@ -3,4 +3,4 @@ PROJECT(2205)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2205 220524-CN.cpp)
+ADD_EXECUTABLE(2205 220524.cpp)