From bcf02d6f9fc362da4cb3b20609b0e28f3b0071fe Mon Sep 17 00:00:00 2001
From: Lam Haoyin <root@eatswap.org>
Date: Fri, 25 Feb 2022 22:23:16 +0800
Subject: [PATCH] add: 220225 [cpp]

---
 cpp/2202/220225.cpp     | 46 +++++++++++++++++++++++++++++++++++++++++
 cpp/2202/CMakeLists.txt |  2 +-
 2 files changed, 47 insertions(+), 1 deletion(-)
 create mode 100644 cpp/2202/220225.cpp

diff --git a/cpp/2202/220225.cpp b/cpp/2202/220225.cpp
new file mode 100644
index 0000000..34f2a7d
--- /dev/null
+++ b/cpp/2202/220225.cpp
@@ -0,0 +1,46 @@
+#include <string>
+#include <vector>
+#include <iostream>
+
+inline constexpr int sgn(int x) { return x ? (x > 0 ? 1 : -1) : 0; }
+
+class Version {
+private:
+	std::vector<int> revisions;
+public:
+	explicit Version(std::vector<int> v = {1}) : revisions(std::move(v)) {}
+
+	explicit Version(const std::string& str) {
+		int pos = -1;
+		revisions.clear();
+		const char* s = str.c_str();
+
+		do {
+			int x = std::atoi(s + pos + 1);
+			revisions.push_back(x);
+		} while (-1 != (pos = str.find('.', pos + 1)));
+	}
+
+	int compareTo(const Version& rhs) const {
+		int m = this->revisions.size(), n = rhs.revisions.size();
+		int k = std::max(m, n);
+		for (int i = 0; i < k; ++i)
+			if (sgn((i < m ? this->revisions[i] : 0) - (i < n ? rhs.revisions[i] : 0)))
+				return sgn((i < m ? this->revisions[i] : 0) - (i < n ? rhs.revisions[i] : 0));
+		return 0;
+	}
+};
+
+class Solution {
+public:
+	static int compareVersion(const std::string& version1, const std::string& version2) {
+		return Version(version1).compareTo(Version(version2));
+	}
+};
+
+int main() {
+	std::cout << Solution::compareVersion("1.01", "1.001");
+	std::cout << Solution::compareVersion("1.0", "1.0.0");
+	std::cout << Solution::compareVersion("0.1", "1.1");
+	return 0;
+}
diff --git a/cpp/2202/CMakeLists.txt b/cpp/2202/CMakeLists.txt
index 7b782db..0bc6028 100644
--- a/cpp/2202/CMakeLists.txt
+++ b/cpp/2202/CMakeLists.txt
@@ -3,4 +3,4 @@ PROJECT(2202)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2202 220225-CN.cpp)
+ADD_EXECUTABLE(2202 220225.cpp)