add: 230321

cpp/2303/230321.cpp

@@ -0,0 +1,34 @@
+#include <vector>
+#include <iostream>
+
+/**
+ * 2348. Number of Zero-Filled Subarrays
+ *
+ * Given an integer array nums, return the number of subarrays filled with 0.
+ * A subarray is a contiguous non-empty sequence of elements within an array.
+ */
+
+class Solution {
+private:
+	static constexpr long long f(long long x) {
+		return x * (x + 1) / 2;
+	}
+
+public:
+	static long long zeroFilledSubarray(const std::vector<int>& n) {
+		long long ans = 0;
+		int c = 0;
+		for (int i : n) {
+			if (i) {
+				ans += f(c);
+				c = 0;
+			} else ++c;
+		}
+		return ans + f(c);
+	}
+};
+
+int main() {
+	std::cout << Solution::zeroFilledSubarray({2,10,2019});
+	return 0;
+}

cpp/2303/CMakeLists.txt

@@ -3,4 +3,4 @@ PROJECT(2303)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2303 230321-CN.cpp)
+ADD_EXECUTABLE(2303 230321.cpp)