diff --git a/cs-lab34.cbp b/cs-lab34.cbp
index 49b0653..00fdc54 100644
--- a/cs-lab34.cbp
+++ b/cs-lab34.cbp
@@ -32,6 +32,10 @@
 			<Add option="-Wall" />
 			<Add option="-fexceptions" />
 		</Compiler>
+		<Unit filename="histogram.cpp" />
+		<Unit filename="histogram.h">
+			<Option target="&lt;{~None~}&gt;" />
+		</Unit>
 		<Unit filename="main.cpp" />
 		<Extensions>
 			<lib_finder disable_auto="1" />
diff --git a/histogram.cpp b/histogram.cpp
index 8533f35..9ec9340 100644
--- a/histogram.cpp
+++ b/histogram.cpp
@@ -1,5 +1,5 @@
 #include "histogram.h"
-
+using namespace std;
 static void find_minmax(const vector<double>& numbers, double& min, double& max)
 {
     min = numbers[0];
@@ -16,9 +16,7 @@ static void find_minmax(const vector<double>& numbers, double& min, double& max)
         }
     }
 }
-
-vector<size_t>
-make_histogram(const vector<double>& numbers, size_t& bin_count)
+vector<size_t> make_histogram(const vector<double>& numbers, size_t& bin_count)
 {
     double min = 0;
     double max = 0;
diff --git a/histogram.h b/histogram.h
index d152317..a521200 100644
--- a/histogram.h
+++ b/histogram.h
@@ -1,8 +1,10 @@
 #ifndef HISTOGRAM_H_INCLUDED
 #define HISTOGRAM_H_INCLUDED
+
 #include <vector>
 
 std::vector<size_t>
+
 make_histogram(const std::vector<double>& numbers, size_t bin_count);
 
 #endif // HISTOGRAM_H_INCLUDED
diff --git a/main.cpp b/main.cpp
index 2d4a82a..04c7403 100644
--- a/main.cpp
+++ b/main.cpp
@@ -25,7 +25,6 @@ input_data() {
     return in;
 }
 
-
 void
 show_histogram_text(const vector<size_t>& bins, size_t& bin_count) {
     const size_t SCREEN_WIDTH = 80;