diff --git a/AcWing/747/747.cpp b/AcWing/747/747.cpp
new file mode 100644
index 00000000..226d4b75
--- /dev/null
+++ b/AcWing/747/747.cpp
@@ -0,0 +1,17 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+    char op;
+    cin >> op;
+    double x, sum = 0;
+    for (int i = 0; i < 12; i++) {
+        for (int j = 0; j < 12; j++) {
+            cin >> x;
+            if (i < 11 - j) sum += x;
+        }
+    }
+    cout << fixed << setprecision(1) << sum / (op == 'S' ? 1 : 66) << endl;
+    return 0;
+}