diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..9fd8329
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+/bin
+/obj
+/lab01.layout
+/curl
diff --git a/histogram.cpp b/histogram.cpp
new file mode 100644
index 0000000..61c3e6b
--- /dev/null
+++ b/histogram.cpp
@@ -0,0 +1,49 @@
+#include <iostream>
+#include <vector>
+
+#include "histogram.h"
+
+using namespace std;
+
+void
+find_minmax(const vector<double>& numbers, double& min, double& max) {
+    min = numbers[0];
+    max = numbers[0];
+
+    for (double x : numbers) {
+        if (x < min) {
+            min = x;
+        }
+        else if (x > max) {
+            max = x;
+        }
+    }
+};
+
+vector <size_t>
+make_histogram(const vector<double> numbers, size_t bin_count){
+
+    vector <size_t> bins(bin_count);
+    double min, max;
+    find_minmax(numbers, min, max);
+
+    double bin_size = (max - min) / bin_count;
+
+    for (size_t i = 0; i < numbers.size(); i++) {
+        bool found = false;
+        for (size_t j = 0; (j < bin_count - 1) && !found; j++) {
+            auto lo = min + j * bin_size;
+            auto hi = min + (j + 1) * bin_size;
+            if ((lo <= numbers[i]) && (numbers[i] < hi)) {
+                bins[j]++;
+                found = true;
+            }
+        }
+
+        if (!found) {
+            bins[bin_count - 1]++;
+        }
+    }
+
+    return bins;
+}
diff --git a/histogram.h b/histogram.h
new file mode 100644
index 0000000..fa931b6
--- /dev/null
+++ b/histogram.h
@@ -0,0 +1,11 @@
+#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/histogram_internal.h b/histogram_internal.h
new file mode 100644
index 0000000..ee51206
--- /dev/null
+++ b/histogram_internal.h
@@ -0,0 +1,8 @@
+#ifndef HISTOGRAM_INTERNAL_H_INCLUDED
+#define HISTOGRAM_INTERNAL_H_INCLUDED
+
+void
+find_minmax(const std::vector<double>& numbers, double& min, double& max);
+
+
+#endif // HISTOGRAM_INTERNAL_H_INCLUDED
diff --git a/svg.cpp b/svg.cpp
new file mode 100644
index 0000000..26e981e
--- /dev/null
+++ b/svg.cpp
@@ -0,0 +1,76 @@
+#include <math.h>
+#include <iostream>
+#include <conio.h>
+#include <vector>
+#include <string>
+#include "svg.h"
+
+using namespace std;
+
+void
+svg_begin(double width, double height) {
+    cout << "<?xml version='1.0' encoding='UTF-8'?>\n";
+    cout << "<svg ";
+    cout << "width='" << width << "' ";
+    cout << "height='" << height << "' ";
+    cout << "viewBox='0 0 " << width << " " << height << "' ";
+    cout << "xmlns='http://www.w3.org/2000/svg'>\n";
+}
+
+void
+svg_end() {
+    cout << "</svg>\n";
+}
+
+void
+svg_text(double left, double baseline, string text) {
+    cout << "<text x='" << left << "' y='" << baseline << "'>" << text << "</text>";
+
+}
+
+void
+svg_rect(double x, double y, double width, double height, string stroke, string fill){
+    cout << "<rect x='"<<x<<"' y='"<<y<<"' width='"<<width<<"' height='"<<height<<"' stroke='"<<stroke<<"' fill='"<<fill<<"' />";
+
+}
+
+
+
+void
+show_histogram_svg(const vector<size_t>& bins, size_t number_count, size_t bin_count) {
+    const auto IMAGE_WIDTH = 400;
+    auto IMAGE_HEIGHT = 700;
+    const auto TEXT_LEFT = 20;
+    const auto TEXT_BASELINE = 20;
+    const auto TEXT_WIDTH = 50;
+    const auto BIN_HEIGHT = 30;
+    const auto BLOCK_WIDTH = 10;
+    const auto MAX_WIDTH = IMAGE_WIDTH-TEXT_WIDTH;
+
+    cerr << "Input IMAGE_HEIGHT: ";
+    cin >> IMAGE_HEIGHT;
+    if (IMAGE_HEIGHT > 700){
+        IMAGE_HEIGHT=IMAGE_HEIGHT;
+    }
+
+    svg_begin(IMAGE_WIDTH, IMAGE_HEIGHT);
+
+    double top = 0;
+
+    double max_count = bins[0];
+    for (size_t i = 0; i < bins.size(); i++){
+        if (bins[i] > max_count)
+            max_count = bins[i];
+    }
+
+    for (size_t bin : bins) {
+        const double bin_width = (IMAGE_WIDTH - TEXT_WIDTH)*(bin/max_count);
+        svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
+        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT,"#FFFFFF","#32CD32");
+        top += BIN_HEIGHT;
+    }
+
+    svg_end();
+}
+
+
diff --git a/svg.h b/svg.h
new file mode 100644
index 0000000..c284e93
--- /dev/null
+++ b/svg.h
@@ -0,0 +1,11 @@
+#ifndef SVG_H_INCLUDED
+#define SVG_H_INCLUDED
+
+#include <vector>
+
+void
+show_histogram_svg(const std::vector<size_t>& bins, size_t number_count, size_t bin_count);
+
+
+
+#endif // SVG_H_INCLUDED
diff --git a/text.cpp b/text.cpp
new file mode 100644
index 0000000..e11a834
--- /dev/null
+++ b/text.cpp
@@ -0,0 +1,21 @@
+#include <iostream>
+#include <vector>
+#include "text.h"
+
+using namespace std;
+
+void
+show_histogram_text(const vector<size_t> bins, size_t number_count, size_t bin_count){
+
+    for (size_t i = 0; i < bin_count; i++){
+
+        if (bins[i] < 100) cout << " ";
+        if (bins[i] < 10) cout << " ";
+        cout << bins[i] << "|";
+
+        for(size_t j=0; j < bins[i]; j++){
+                    cout << "*";
+        }
+         cout<<endl;
+    }
+}
diff --git a/unittest.cbp b/unittest.cbp
new file mode 100644
index 0000000..362d624
--- /dev/null
+++ b/unittest.cbp
@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
+<CodeBlocks_project_file>
+	<FileVersion major="1" minor="6" />
+	<Project>
+		<Option title="unittest" />
+		<Option pch_mode="2" />
+		<Option compiler="gcc" />
+		<Build>
+			<Target title="Debug">
+				<Option output="bin/Debug/unittest" prefix_auto="1" extension_auto="1" />
+				<Option object_output="obj/Debug/" />
+				<Option type="1" />
+				<Option compiler="gcc" />
+				<Compiler>
+					<Add option="-g" />
+				</Compiler>
+			</Target>
+			<Target title="Release">
+				<Option output="bin/Release/unittest" prefix_auto="1" extension_auto="1" />
+				<Option object_output="obj/Release/" />
+				<Option type="1" />
+				<Option compiler="gcc" />
+				<Compiler>
+					<Add option="-O2" />
+				</Compiler>
+				<Linker>
+					<Add option="-s" />
+				</Linker>
+			</Target>
+		</Build>
+		<Compiler>
+			<Add option="-Wall" />
+		</Compiler>
+		<Unit filename="unittest.cpp" />
+		<Extensions>
+			<lib_finder disable_auto="1" />
+		</Extensions>
+	</Project>
+</CodeBlocks_project_file>
diff --git a/unittest.cpp b/unittest.cpp
new file mode 100644
index 0000000..8ae27f7
--- /dev/null
+++ b/unittest.cpp
@@ -0,0 +1,39 @@
+#define DOCTEST_CONFIG_NO_MULTITHREADING
+#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
+#include "doctest.h"
+#include "histogram_internal.h"
+
+TEST_CASE("distinct positive numbers") {
+    double min = 0;
+    double max = 0;
+    find_minmax({1, 2}, min, max);
+    CHECK(min == 1);
+    CHECK(max == 2);
+}
+
+TEST_CASE("vector with one element"){
+    double min = 0;
+    double max = 0;
+    find_minmax({1}, min, max);
+    CHECK(min == 1);
+    CHECK(max == 1);
+}
+
+TEST_CASE("vector of negative elements"){
+    double min = 0;
+    double max = 0;
+    find_minmax({-1, -2}, min, max);
+    CHECK(min == -2);
+    CHECK(max == -1);
+}
+
+TEST_CASE("vector of identical elements"){
+    double min = 0;
+    double max = 0;
+    find_minmax({2, 2}, min, max);
+    CHECK(min == 2);
+    CHECK(max == 2);
+}
+
+
+