diff --git a/histogram.cpp b/histogram.cpp
index 50cb037..820c885 100644
--- a/histogram.cpp
+++ b/histogram.cpp
@@ -7,8 +7,9 @@ using namespace std;
 
 void
 find_minmax(const vector<double>& numbers, double& min, double& max){
+    if (numbers.size() >=1){
     min = numbers[0];
-    min = numbers[0];
+    max = numbers[0];
     for(size_t i=0; i < numbers.size(); i++){
         if (numbers[i] < min)
         {
@@ -18,7 +19,7 @@ find_minmax(const vector<double>& numbers, double& min, double& max){
         {
             max = numbers[i];
         }
-    }
+    }}
 }
 
 
diff --git a/histogram_internal.h b/histogram_internal.h
index 5c31312..654569d 100644
--- a/histogram_internal.h
+++ b/histogram_internal.h
@@ -6,3 +6,4 @@ void
 find_minmax(const std::vector<double>& numbers, double& min, double& max);
 
 #endif // HISTOGRAM_INTERNAL_H_INCLUDED
+
diff --git a/laba3.cbp b/laba3.cbp
index 2a15d57..c1218af 100644
--- a/laba3.cbp
+++ b/laba3.cbp
@@ -32,7 +32,15 @@
 			<Add option="-Wall" />
 			<Add option="-fexceptions" />
 		</Compiler>
+		<Unit filename="histogram.cpp" />
+		<Unit filename="histogram.h" />
+		<Unit filename="histogram_internal.h" />
+		<Unit filename="input_colors_internal.h" />
 		<Unit filename="main.cpp" />
+		<Unit filename="svg.cpp" />
+		<Unit filename="svg.h" />
+		<Unit filename="text.cpp" />
+		<Unit filename="text.h" />
 		<Extensions />
 	</Project>
 </CodeBlocks_project_file>
diff --git a/main.cpp b/main.cpp
index 3246b34..e63a609 100644
--- a/main.cpp
+++ b/main.cpp
@@ -11,8 +11,8 @@ using namespace std;
 struct Input {
     vector<double> numbers;
     size_t bin_count{};
-    string stroke;
-    string fill;
+    vector<string> stroke;
+    vector<string> fill;
 };
 
 Input
@@ -34,20 +34,25 @@ input_data(){
     cerr << "Enter bin count: ";
     cin >> in.bin_count;
 
-    cerr << "Enter color: ";
-    cin >> in.stroke;
-
-    cerr << "Enter color to fill: ";
-    cin >> in.fill;
+    in.stroke.resize(in.bin_count);
+    in.fill.resize(in.bin_count);
+    for (size_t i=0;i<in.bin_count;i++){
+        cerr <<"Enter stroke in format RGB:";
+        cin >>in.stroke[i];
+         cerr <<"Enter fill in format RGB:";
+        cin >>in.fill[i];
+    }
 
     return in;
 }
 
+
 int main()
 {
 
     auto in = input_data();
     std::vector<size_t> bins = make_histogram(in.numbers, in.bin_count);
-    show_histogram_svg(bins, in.stroke, in.fill);
+    show_histogram_svg(bins,in.stroke,in.fill);
     return 0;
 }
+
diff --git a/svg.cpp b/svg.cpp
index 88bf76a..05a46af 100644
--- a/svg.cpp
+++ b/svg.cpp
@@ -29,28 +29,9 @@ void
 svg_rect(double x, double y, double width, double height, string stroke = "chartreuse", string fill = "plum"){
     cout << "<rect x='" << x << "' y='" << y << "' width='" << width << "' height='" << height << "' stroke='" << stroke << "' fill='" << fill << "'/>";
 }
+
 void
-input_colors(string &colors_stroke, string &colors_fill){
-    string color_personal;
-    cout << "Do you want to change colors? Yes/No" << endl;
-    cin >> color_personal;
-    while ((color_personal != "No") && (color_personal != "Yes")){
-        cout << "WRONG ANSWER! Try again!" << endl;
-        cin >> color_personal;
-    }
-    if (color_personal == "No"){
-        return;
-    }
-    else {
-        cout << "What color for a stroke do you want?" << endl;
-        cin >> colors_stroke;
-        cout << "What color to fill do you want?" << endl;
-        cin >> colors_fill;
-    }
-    return;
-}
-void
-show_histogram_svg(const vector<size_t>& bins, string stroke, string fill) {
+show_histogram_svg(const vector<size_t>& bins, const vector<string>& stroke,const vector<string>& fill) {
     const auto IMAGE_WIDTH = 400;
     const auto IMAGE_HEIGHT = 300;
     const auto TEXT_LEFT = 20;
@@ -67,10 +48,10 @@ show_histogram_svg(const vector<size_t>& bins, string stroke, string fill) {
             maxel = bin;
         }
     }
-    for (size_t bin : bins) {
-        const double bin_width = (( IMAGE_WIDTH - TEXT_WIDTH ) / BLOCK_WIDTH ) * ( bin / maxel );
-        svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
-        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, stroke, fill);
+    for (size_t i=0; i<bins.size(); i++) {
+        const double bin_width = (( IMAGE_WIDTH - TEXT_WIDTH ) / BLOCK_WIDTH ) * ( bins[i] / maxel );
+        svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bins[i]));
+        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, stroke[i], fill[i]);
         top += BIN_HEIGHT;
     }
     svg_end();
diff --git a/svg.h b/svg.h
index 4859b3e..af3caa7 100644
--- a/svg.h
+++ b/svg.h
@@ -3,5 +3,5 @@
 #include <vector>
 
 void
-show_histogram_svg(const std::vector<size_t>& bins, std::string stroke, std::string fill);
+show_histogram_svg(const std::vector<size_t>& bins, const std::vector<std::string>& stroke, const std::vector<std::string>& fill);
 
diff --git a/unittest.cbp b/unittest.cbp
index 7f9621b..cc815ba 100644
--- a/unittest.cbp
+++ b/unittest.cbp
@@ -31,6 +31,12 @@
 		<Compiler>
 			<Add option="-Wall" />
 		</Compiler>
+		<Unit filename="doctest.h" />
+		<Unit filename="histogram.cpp" />
+		<Unit filename="histogram_internal.h" />
+		<Unit filename="input_colors_internal.h" />
+		<Unit filename="svg.cpp" />
+		<Unit filename="unittest.cpp" />
 		<Extensions>
 			<lib_finder disable_auto="1" />
 		</Extensions>
diff --git a/unittest.cpp b/unittest.cpp
index f4d7164..0025075 100644
--- a/unittest.cpp
+++ b/unittest.cpp
@@ -2,23 +2,6 @@
 #define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
 #include "doctest.h"
 #include "histogram_internal.h"
-#include "input_colors_internal.h"
-
-TEST_CASE("Mistakes in spelling") {
-    std::string colors_stroke = "black";
-    std::string colors_fill = "green";
-    input_colors(colors_stroke, colors_fill);
-    CHECK(colors_stroke == "yellow");
-    CHECK(colors_fill == "pink");
-}
-
-TEST_CASE("The answer is No") {
-    std::string colors_stroke = "black";
-    std::string colors_fill = "green";
-    input_colors(colors_stroke, colors_fill);
-    CHECK(colors_stroke == "black");
-    CHECK(colors_fill == "green");
-}
 
 TEST_CASE("distinct positive numbers") {
     double min = 0;
@@ -28,18 +11,32 @@ TEST_CASE("distinct positive numbers") {
     CHECK(max == 2);
 }
 
-TEST_CASE("empty vector"){
+TEST_CASE("same elements"){
     double min = 0;
     double max = 0;
-    find_minmax({ 0, 0 }, min, max);
-    CHECK(min == 0);
-    CHECK(max == 0);
+    find_minmax({ 1, 1 }, min, max);
+    CHECK(min == max);
 }
 
-TEST_CASE("same elements"){
+TEST_CASE("only one number"){
     double min = 0;
     double max = 0;
-    find_minmax({ 1, 1 }, min, max);
-    CHECK(min == max);
-    CHECK(max == min);
+    find_minmax({1}, min, max);
+    CHECK(min == 1);
+    CHECK(max == 1);
+}
+
+TEST_CASE("distinct negative numbers") {
+    double min = 0;
+    double max = 0;
+    find_minmax({-1, -2}, min, max);
+    CHECK(min == -2);
+    CHECK(max == -1);
+}
+TEST_CASE("empty vector") {
+    double min = 0;
+    double max = 0;
+    find_minmax({}, min, max);
+    CHECK(min == 0);
+    CHECK(max == 0);
 }