From f8243bfdb3aa468b32067e52e656df8571d26a7d Mon Sep 17 00:00:00 2001
From: Eatswap <root@eatswap.org>
Date: Sat, 1 Apr 2023 15:48:12 +0800
Subject: [PATCH] add: 230401-CN

---
 cpp/2304/230401-CN.cpp  | 66 +++++++++++++++++++++++++++++++++++++++++
 cpp/2304/CMakeLists.txt |  4 +--
 2 files changed, 68 insertions(+), 2 deletions(-)
 create mode 100644 cpp/2304/230401-CN.cpp

diff --git a/cpp/2304/230401-CN.cpp b/cpp/2304/230401-CN.cpp
new file mode 100644
index 0000000..6f256ec
--- /dev/null
+++ b/cpp/2304/230401-CN.cpp
@@ -0,0 +1,66 @@
+#include <algorithm>
+#include <cctype>
+#include <iterator>
+#include <string>
+
+/**
+ * 831. Masking Personal Information
+ *
+ * You are given a personal information string s, representing either an email address or a phone number. Return the masked personal information using the below rules.
+ *
+ * Email address:
+ *
+ * An email address is:
+ *
+ * A name consisting of uppercase and lowercase English letters, followed by
+ * The '@' symbol, followed by
+ * The domain consisting of uppercase and lowercase English letters with a dot '.' somewhere in the middle (not the first or last character).
+ * To mask an email:
+ *
+ * The uppercase letters in the name and domain must be converted to lowercase letters.
+ * The middle letters of the name (i.e., all but the first and last letters) must be replaced by 5 asterisks "*****".
+ * Phone number:
+ *
+ * A phone number is formatted as follows:
+ *
+ * The phone number contains 10-13 digits.
+ * The last 10 digits make up the local number.
+ * The remaining 0-3 digits, in the beginning, make up the country code.
+ * Separation characters from the set {'+', '-', '(', ')', ' '} separate the above digits in some way.
+ * To mask a phone number:
+ *
+ * Remove all separation characters.
+ * The masked phone number should have the form:
+ * "***-***-XXXX" if the country code has 0 digits.
+ * "+*-***-***-XXXX" if the country code has 1 digit.
+ * "+**-***-***-XXXX" if the country code has 2 digits.
+ * "+***-***-***-XXXX" if the country code has 3 digits.
+ * "XXXX" is the last 4 digits of the local number.
+ */
+
+class Solution {
+private:
+	static auto mail(const std::string& s) {
+		auto pos = s.find('@');
+		std::string ret;
+		ret += std::tolower(s[0]);
+		ret += "*****";
+		ret += std::tolower(s[pos - 1]);
+		ret += '@';
+		for (int i = pos + 1; i < s.length(); ++i)
+			ret += std::tolower(s[i]);
+		return ret;
+	}
+
+	static auto phone(const std::string& s) {
+		auto cnt = std::count_if(s.begin(), s.end(), [&](auto&& x) { return std::isdigit(x); });
+		std::string t;
+		std::copy_if(s.begin(), s.end(), std::back_inserter(t), [](auto&& x) { return std::isdigit(x); });
+		return (!(cnt - 10) ? std::string() : "+" + std::string(cnt - 10, '*') + '-') + "***-***-" + t.substr(t.length() - 4, 4);
+	}
+
+public:
+	static auto maskPII(const std::string& s) {
+		return ((s.find('@') != -1) ? mail : phone)(s);
+	}
+};
diff --git a/cpp/2304/CMakeLists.txt b/cpp/2304/CMakeLists.txt
index 437204d..3e82c5f 100644
--- a/cpp/2304/CMakeLists.txt
+++ b/cpp/2304/CMakeLists.txt
@@ -1,6 +1,6 @@
 CMAKE_MINIMUM_REQUIRED(VERSION 3.24)
 PROJECT(2304)
 
-SET(CMAKE_CXX_STANDARD 23)
+SET(CMAKE_CXX_STANDARD 17)
 
-ADD_EXECUTABLE(2304 230401.cpp)
+ADD_EXECUTABLE(2304 230401-CN.cpp)