diff --git a/CMakeLists.txt b/CMakeLists.txt
index 533e154..d490128 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,3 +10,4 @@ ADD_EXECUTABLE(LeetCodeDaily main.cpp)
 
 ADD_SUBDIRECTORY(2112)
 ADD_SUBDIRECTORY(2201)
+ADD_SUBDIRECTORY(more)
diff --git a/more/0005.cpp b/more/0005.cpp
new file mode 100644
index 0000000..f18b7a2
--- /dev/null
+++ b/more/0005.cpp
@@ -0,0 +1,36 @@
+#include <string>
+#include <iostream>
+
+class Solution {
+public:
+	static std::string longestPalindrome(const std::string& s) {
+		int n = s.length(), centre, len = 0;
+		for (int i = 0; i < n; ++i) {
+			int L = i, R = i;
+			while (L - 1 >= 0 && R + 1 < n && s[L - 1] == s[R + 1]) {
+				--L, ++R;
+			}
+			if (len < R - L + 1) {
+				centre = i;
+				len = R - L + 1;
+			}
+		}
+		for (int i = 1; i < n; ++i) {
+			if (s[i] != s[i - 1]) continue;
+			int L = i - 1, R = i;
+			while (L - 1 >= 0 && R + 1 < n && s[L - 1] == s[R + 1]) {
+				--L, ++R;
+			}
+			if (len < R - L + 1) {
+				centre = i;
+				len = R - L + 1;
+			}
+		}
+		return s.substr(centre - len / 2, len);
+	}
+};
+
+int main() {
+	std::cout << Solution::longestPalindrome("eabcb");
+	return 0;
+}
diff --git a/more/CMakeLists.txt b/more/CMakeLists.txt
new file mode 100644
index 0000000..3ab0542
--- /dev/null
+++ b/more/CMakeLists.txt
@@ -0,0 +1,6 @@
+CMAKE_MINIMUM_REQUIRED(VERSION 3.21)
+PROJECT(more)
+
+SET(CMAKE_CXX_STANDARD 23)
+
+ADD_EXECUTABLE(more 0005.cpp)