From 3d5095d75e83b6ca95533ce1953785295e5a9eed Mon Sep 17 00:00:00 2001
From: Lam Haoyin <root@eatswap.org>
Date: Fri, 4 Feb 2022 11:15:50 +0800
Subject: [PATCH] add: 220204

---
 2202/220204.cpp     | 25 +++++++++++++++++++++++++
 2202/CMakeLists.txt |  2 +-
 2 files changed, 26 insertions(+), 1 deletion(-)
 create mode 100644 2202/220204.cpp

diff --git a/2202/220204.cpp b/2202/220204.cpp
new file mode 100644
index 0000000..6897b9d
--- /dev/null
+++ b/2202/220204.cpp
@@ -0,0 +1,25 @@
+#include <vector>
+#include <unordered_map>
+#include <iostream>
+
+class Solution {
+public:
+	static int findMaxLength(const std::vector<int>& nums) {
+		int sum = 0, n = nums.size(), ret = 0;
+		std::unordered_map<int, int> m;
+		m[0] = -1;
+		for (int i = 0; i < n; ++i) {
+			sum += 1 - (nums[i] << 1);
+			if (m.count(sum))
+				ret = ret < i - m[sum] ? i - m[sum] : ret;
+			else
+				m[sum] = i;
+		}
+		return ret;
+	}
+};
+
+int main() {
+	std::cout << Solution::findMaxLength({0,1,0});
+	return 0;
+}
diff --git a/2202/CMakeLists.txt b/2202/CMakeLists.txt
index 558e82d..f353726 100644
--- a/2202/CMakeLists.txt
+++ b/2202/CMakeLists.txt
@@ -3,4 +3,4 @@ PROJECT(2202)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2202 220203-CN.cpp)
+ADD_EXECUTABLE(2202 220204.cpp)