add: 220317-CN [cpp]

cpp/2203/220317-CN.cpp

@@ -0,0 +1,39 @@
+#include <vector>
+#include <string>
+#include <queue>
+#include <unordered_set>
+#include <iostream>
+
+class Solution {
+public:
+	static std::string longestWord(const std::vector<std::string>& words) {
+		std::unordered_set<std::string> s(words.begin(), words.end());
+		std::string ans = "";
+		int ansLen = 0;
+
+		std::queue<std::string> q;
+		q.push("");
+		while (!q.empty()) {
+			std::string x = q.front();
+			q.pop();
+			int xLen = x.length();
+			for (char c = 'a'; c <= 'z'; ++c) {
+				std::string nx = x + c;
+				if (s.count(nx)) {
+					if (nx.length() > ansLen) {
+						ans = nx;
+						ansLen = nx.length();
+					}
+					q.push(nx);
+				}
+			}
+		}
+
+		return ans;
+	}
+};
+
+int main() {
+	std::cout << Solution::longestWord({"a","banana","app","appl","ap","apply","apple"});
+	return 0;
+}

cpp/2203/CMakeLists.txt

@@ -3,4 +3,4 @@ PROJECT(2203)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2203 220317.cpp)
+ADD_EXECUTABLE(2203 220317-CN.cpp)