diff --git a/cpp/2203/220320.cpp b/cpp/2203/220320.cpp
new file mode 100644
index 0000000..1445d76
--- /dev/null
+++ b/cpp/2203/220320.cpp
@@ -0,0 +1,38 @@
+#include <vector>
+#include <iostream>
+
+/**
+ * 1007. Minimum Domino Rotations For Equal Row
+ * In a row of dominoes, tops[i] and bottoms[i] represent the top and bottom halves of the ith domino. (A domino is a tile with two numbers from 1 to 6 - one on each half of the tile.)
+ * We may rotate the ith domino, so that tops[i] and bottoms[i] swap values.
+ * Return the minimum number of rotations so that all the values in tops are the same, or all the values in bottoms are the same.
+ * If it cannot be done, return -1.
+ */
+
+class Solution {
+public:
+	static int minDominoRotations(const std::vector<int>& tops, const std::vector<int>& bottoms) {
+		int n = tops.size();
+		int cnt[7]{}, cntTop[7]{}, cntBottom[7]{};
+		for (int i = 0; i < n; ++i) {
+			++cnt[tops[i]];
+			++cntTop[tops[i]];
+			++cntBottom[bottoms[i]];
+			if (tops[i] != bottoms[i])
+				++cnt[bottoms[i]];
+		}
+
+		int ret = 0x7FFFFFFF;
+		for (int i = 1; i <= 6; ++i)
+			if (cnt[i] >= n)
+				ret = std::min(ret, int(n - std::max(cntTop[i], cntBottom[i])));
+
+		return ret == 0x7FFFFFFF ? -1 : ret;
+	}
+};
+
+int main() {
+	std::cout << Solution::minDominoRotations({2,1,2,4,2,2}, {5,2,6,2,3,2}) << "\n";
+	std::cout << Solution::minDominoRotations({3,5,1,2,3}, {3,6,3,3,4}) << "\n";
+	return 0;
+}
diff --git a/cpp/2203/CMakeLists.txt b/cpp/2203/CMakeLists.txt
index 09e998f..7efa44b 100644
--- a/cpp/2203/CMakeLists.txt
+++ b/cpp/2203/CMakeLists.txt
@@ -3,4 +3,4 @@ PROJECT(2203)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2203 220319.cpp)
+ADD_EXECUTABLE(2203 220320.cpp)