add: 220420-CN [cpp]

cpp/2204/220420-CN.cpp

@@ -0,0 +1,35 @@
+#include <string>
+#include <algorithm>
+
+class Solution {
+public:
+	static int lengthLongestPath(const std::string& input) {
+		int max = 0;
+		short partLen[5001]{};
+
+		for (const char* ptr = input.c_str(); *ptr; ++ptr) {
+			short level = 0, len = 0, current = 0, ok = 0;
+			for (; *ptr && *ptr == '\t'; ++ptr)
+				++level;
+			for (; *ptr && *ptr != '\n'; ++ptr, ++len)
+				ok |= (*ptr == '.');
+			partLen[level] = len;
+
+			if (!ok)
+				continue;
+
+			for (int i = level; i >= 0; --i)
+				current += partLen[i];
+			max = std::max(max, current + level);
+
+			if (!*ptr)
+				break;
+		}
+		return max;
+	}
+};
+
+int main() {
+	auto x = Solution::lengthLongestPath("a");
+	return 0;
+}

cpp/2204/CMakeLists.txt

@@ -3,4 +3,4 @@ PROJECT(2204)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2204 220420.cpp)
+ADD_EXECUTABLE(2204 220420-CN.cpp)