diff --git a/AcWing/661/661.cpp b/AcWing/661/661.cpp
new file mode 100644
index 00000000..fc2c25cb
--- /dev/null
+++ b/AcWing/661/661.cpp
@@ -0,0 +1,27 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+    double a, b, c, d, x, y, z;
+    cin >> a >> b >> c >> d;
+    x = (2.00 * a + 3.00 * b + 4.00 * c + 1.00 * d) / 10.00;
+    printf("Media: %.1lf\n", x + 0.01);
+    if (x >= 7.0)
+        cout << "Aluno aprovado." << endl;
+    else if (x < 5.0)
+        cout << "Aluno reprovado." << endl;
+    else {
+        cout << "Aluno em exame." << endl;
+        cin >> y;
+        printf("Nota do exame: %.1lf\n", y + 0.01);
+        z = (x + y) / 2;
+        if (z >= 5.0)
+            cout << "Aluno aprovado." << endl;
+        else
+            cout << "Aluno reprovado." << endl;
+        cerr << z << endl;
+        printf("Media final: %.1lf\n", z);
+    }
+    return 0;
+}