diff --git a/histogram.cpp b/histogram.cpp
index a247501..8b24bce 100644
--- a/histogram.cpp
+++ b/histogram.cpp
@@ -4,7 +4,11 @@
 #include "histogram_internal.h"
 using namespace std;
 
-void find_minmax(const vector<double>& numbers, double& min, double& max) {
+bool find_minmax(const vector<double>& numbers, double& min, double& max) {
+    if(numbers.empty()){
+        return false;
+    }
+    else{
     min = numbers[0];
     max = numbers[0];
     for (double x : numbers) {
@@ -15,6 +19,8 @@ void find_minmax(const vector<double>& numbers, double& min, double& max) {
             max = x;
         }
     }
+    return true;
+    }
 }
 
 //создание гистограммы
diff --git a/histogram_internal.h b/histogram_internal.h
index 0a08577..428ad04 100644
--- a/histogram_internal.h
+++ b/histogram_internal.h
@@ -4,7 +4,7 @@
 #include <vector>
 
 
-void find_minmax(const std::vector<double>& numbers, double& min, double& max);
+bool find_minmax(const std::vector<double>& numbers, double& min, double& max);
 
 
 #endif // HISTOGRAM_INTERNAL_H_INCLUDED
diff --git a/svg.cpp b/svg.cpp
index 25a2805..386b01b 100644
--- a/svg.cpp
+++ b/svg.cpp
@@ -50,16 +50,26 @@ show_histogram_svg(const vector<size_t>& bins) {
     const auto BIN_HEIGHT = 30;
     const auto BLOCK_WIDTH = 10;
 
+    const auto MAX_WIDTH = IMAGE_WIDTH - TEXT_WIDTH;
+
+    size_t max_bin = 0;
+    for (size_t bin : bins) {
+        if (bin > max_bin) {
+            max_bin = bin;
+        }
+    }
     //
     svg_begin(400, 300);
     double top = 0;
     for (size_t bin : bins) {
-        const double bin_width = BLOCK_WIDTH * bin;
-        svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
-        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT);
+
+        double bin_width = 0;
+        bin_width = (MAX_WIDTH * bin) / max_bin;
+
+        svg_text(IMAGE_WIDTH - TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
+        svg_rect(IMAGE_WIDTH - TEXT_WIDTH - bin_width, top, bin_width, BIN_HEIGHT);
         top += BIN_HEIGHT;
     }
     svg_end();
 }
-//Самостоятельно. Реализуйте для гистограммы в SVG масштабирование: самый длинный столбец должен занимать (IMAGE_WIDTH - TEXT_WIDTH) точек.!!!!!!!!!!!!!!!!!!!!!!!!!!
 
diff --git a/unittest.cpp b/unittest.cpp
index fde8f10..768ffaa 100644
--- a/unittest.cpp
+++ b/unittest.cpp
@@ -3,7 +3,13 @@
 #include "doctest.h"
 #include "histogram_internal.h"
 
-TEST_CASE("distinct positive numbers") {
+TEST_CASE("пустой вектор") {
+    double min = 0;
+    double max = 0;
+    CHECK(!(find_minmax({}, min, max)));
+}
+
+TEST_CASE("позитивные числа") {
     double min = 0;
     double max = 0;
     find_minmax({1, 2}, min, max);
@@ -11,7 +17,7 @@ TEST_CASE("distinct positive numbers") {
     CHECK(max == 2);
 }
 
-TEST_CASE("all negative numbers"){
+TEST_CASE("все негативные"){
     double min = 0;
     double max = 0;
     find_minmax({-1, -2}, min, max);
@@ -19,7 +25,7 @@ TEST_CASE("all negative numbers"){
     CHECK(max == -1);
 }
 
-TEST_CASE("vector of the same elements"){
+TEST_CASE("одинаковые элементы"){
     double min = 0;
     double max = 0;
     find_minmax({3,3,3}, min, max);
@@ -27,3 +33,12 @@ TEST_CASE("vector of the same elements"){
     CHECK(max == 3);
 
 }
+
+TEST_CASE("один элемент"){
+    double min = 0;
+    double max = 0;
+    find_minmax({3}, min, max);
+    CHECK(min == 3);
+    CHECK(max == 3);
+
+}