diff --git a/Codeforces/1621/D/D.cpp b/Codeforces/1621/D/D.cpp
new file mode 100644
index 00000000..75d88f1e
--- /dev/null
+++ b/Codeforces/1621/D/D.cpp
@@ -0,0 +1,38 @@
+#include <iostream>
+#include <algorithm>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const int N = 255;
+
+int t, n, a[N][N];
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    cin >> t;
+
+    while (t--) {
+        cin >> n;
+
+        for (int i = 1; i <= n << 1; i++) {
+            for (int j = 1; j <= n << 1; j++) {
+                cin >> a[i][j];
+            }
+        }
+
+        long long ans = 0;
+        for (int i = n + 1; i <= n + n; i++) {
+            for (int j = n + 1; j <= n + n; j++) {
+                ans += a[i][j];
+            }
+        }
+
+        cout << ans + std::min({a[1][n + 1], a[1][n + n], a[n][n + 1], a[n][n + n], a[n + 1][n], a[n + 1][1], a[n + n][1], a[n + n][n]}) << endl;
+    }
+
+    return 0;
+}