From f87fc3bfc7631dea4bb82d83bca630e58c4c2008 Mon Sep 17 00:00:00 2001
From: Eat-Swap <root@eatswap.org>
Date: Mon, 13 Jun 2022 00:15:53 +0800
Subject: [PATCH] add: 220612-CN [cpp]

---
 cpp/2206/220612-CN.cpp  | 51 +++++++++++++++++++++++++++++++++++++++++
 cpp/2206/CMakeLists.txt |  2 +-
 2 files changed, 52 insertions(+), 1 deletion(-)
 create mode 100644 cpp/2206/220612-CN.cpp

diff --git a/cpp/2206/220612-CN.cpp b/cpp/2206/220612-CN.cpp
new file mode 100644
index 0000000..b929b28
--- /dev/null
+++ b/cpp/2206/220612-CN.cpp
@@ -0,0 +1,51 @@
+#include <vector>
+#include <string>
+#include <cstdio>
+
+/**
+ * 890. Find and Replace Pattern
+ * Given a list of strings words and a string pattern, return a list of words[i] that match pattern. You may return the answer in any order.
+ * A word matches the pattern if there exists a permutation of letters p so that after replacing every letter x in the pattern with p(x), we get the desired word.
+ * Recall that a permutation of letters is a bijection from letters to letters: every letter maps to another letter, and no two letters map to the same letter.
+ */
+
+class Solution {
+private:
+	static unsigned long long hash(const std::string& str) {
+		unsigned long long ret = 0;
+		// char rm[27]{};
+		int m[27]{}; // a -> 1.
+		int roundRobin = 0, pos = 1;
+		for (char ch : str) {
+			if (!m[ch - 'a' + 1]) {
+			//	rm[pos] = ch;
+				m[ch - 'a' + 1] = pos++;
+			}
+			unsigned long long x = m[ch - 'a' + 1];
+			ret ^= x << (roundRobin * 5);
+			roundRobin = (roundRobin + 1) % 12;
+		}
+		return ret;
+	}
+
+public:
+	static std::vector<std::string> findAndReplacePattern(const std::vector<std::string>& words, const std::string& pattern) {
+		// std::printf("Pattern -> 0x%016llX\n", hash(pattern));
+		const auto patternHash = hash(pattern);
+
+		std::vector<std::string> ret;
+		for (const auto& str : words) {
+			// std::printf("%s -> 0x%016llX\n", str.c_str(), hash(str));
+			if (patternHash == hash(str)) {
+				ret.push_back(str);
+			}
+		}
+
+		return ret;
+	}
+};
+
+int main() {
+	Solution::findAndReplacePattern({"abc","deq","mee","aqq","dkd","ccc"}, "abb");
+	return 0;
+}
diff --git a/cpp/2206/CMakeLists.txt b/cpp/2206/CMakeLists.txt
index 2751e08..0990e20 100644
--- a/cpp/2206/CMakeLists.txt
+++ b/cpp/2206/CMakeLists.txt
@@ -3,4 +3,4 @@ PROJECT(2206)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2206 220606-CN.cpp)
+ADD_EXECUTABLE(2206 220612-CN.cpp)