diff --git a/main.cpp b/main.cpp
index b5bd8ec..9de5622 100644
--- a/main.cpp
+++ b/main.cpp
@@ -13,9 +13,10 @@ using namespace std;
     };
 
 Input
-input_data(istream& tin)
+input_data(istream& tin, bool promt)
 {
     size_t n;
+    if (promt)
     cerr<<"Marks: ";
     tin>>n;
 
@@ -27,6 +28,7 @@ input_data(istream& tin)
         cin>>in.A[i];
     }
 
+    if (promt)
     cerr<<"Rows: ";
     tin>>in.bin;
     return in;
@@ -34,7 +36,7 @@ input_data(istream& tin)
 
 int main()
 {
-    auto in = input_data(cin);
+    auto in = input_data(cin, false);
     auto B = make_histogram(in.A, in.bin);
     show_histogram_svg (B);