diff --git a/i.Smirnov_25.11.cpp b/i.Smirnov_25.11.cpp
new file mode 100644
index 0000000..8cae749
--- /dev/null
+++ b/i.Smirnov_25.11.cpp
@@ -0,0 +1,16 @@
+#include <vector>
+
+float D(o, a)
+{
+    float d=o/a;
+    return d;
+}
+
+int main()
+{
+    float vl, x, drv;
+    drv=D(vl, x);
+    drv=D(drv, x);
+
+    return 0;
+}
\ No newline at end of file