diff --git a/main.cpp b/main.cpp
index 4d27b05..04d2066 100644
--- a/main.cpp
+++ b/main.cpp
@@ -11,16 +11,20 @@ struct Input {
 
 };
 Input
-input_data(istream& inx){
+input_data(istream& in){
+    bool prompt = true;
     size_t number_count;
+    if (prompt) cerr << "Input amount of numbers: "
     cin >> number_count;
 
     Input in;
+    if (prompt) cerr << "Input some numbers: "
     in.numbers.resize(number_count);
     for (size_t i = 0; i < number_count; i++) {
-        inx >> in.numbers[i];
+        in >> in.numbers[i];
     }
-    inx >> in.bin_count;
+    if (prompt) cerr << "Input number of buckets: "
+    in >> in.bin_count;
     return in;
 }
 int main()