diff --git a/labor01.cpp b/labor01.cpp
index 78b1477..615ce80 100644
--- a/labor01.cpp
+++ b/labor01.cpp
@@ -13,25 +13,25 @@ struct Input {
 };
 
 Input
-input_data() {
+input_data(istream& inn) {
     size_t number_count;
     cerr << "Enter number_count: ";
-    cin >> number_count;
+    inn >> number_count;
     Input in;
     cerr << "Enter numbers: ";
     in.numbers.resize(number_count);
     for (size_t i = 0; i < number_count; i++) {
-        cin >> in.numbers[i];
+        inn >> in.numbers[i];
     }
     cerr << "Enter bin_count: ";
-    cin >> in.bin_count;
+    inn >> in.bin_count;
     in.colors.resize(in.bin_count);
     sort(begin(in.numbers), end(in.numbers));
     in.numbers.erase(unique(begin(in.numbers), end(in.numbers)), end(in.numbers));
     number_count = in.numbers.size();
     cerr << "Enter colors: ";
     for (size_t i = 0; i < in.bin_count; i++) {
-        cin >> in.colors[i];
+        inn >> in.colors[i];
     }
     return in;
 }
@@ -39,7 +39,7 @@ input_data() {
 
 
 int main() {
-    auto in = input_data();
+    auto in = input_data(cin);
     auto bins = make_histogram(in.numbers, in.bin_count);
     show_histogram_svg(bins, in.colors);
 }