diff --git a/unittest/cs-project3/histogram.cpp b/unittest/cs-project3/histogram.cpp
index f23db86..45c959d 100644
--- a/unittest/cs-project3/histogram.cpp
+++ b/unittest/cs-project3/histogram.cpp
@@ -3,7 +3,7 @@
 #include "histogram.h"
 using namespace std;
 
-void
+bool
 find_minmax(const vector<double>& numbers, double& min, double& max) {
     min = numbers[0];
     for (size_t i = 1; i < numbers.size(); i++) {
diff --git a/unittest/cs-project3/histogram_internal.h b/unittest/cs-project3/histogram_internal.h
index 7edd3d7..9f05ad0 100644
--- a/unittest/cs-project3/histogram_internal.h
+++ b/unittest/cs-project3/histogram_internal.h
@@ -2,5 +2,5 @@
 
 #include <vector>
 
-void
+bool
 find_minmax(const std::vector<double>& numbers, double& min, double& max);
\ No newline at end of file
diff --git a/unittest/cs-project3/unittest.cpp b/unittest/cs-project3/unittest.cpp
index 825d0fb..29d8167 100644
--- a/unittest/cs-project3/unittest.cpp
+++ b/unittest/cs-project3/unittest.cpp
@@ -2,6 +2,9 @@
 #define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
 #include "doctest.h"
 #include "histogram_internal.h"
+#include "svg.h"
+#include <string>
+#include <fstream>
 
 TEST_CASE("distinct positive numbers") {
     double min = 0;
@@ -23,4 +26,23 @@ TEST_CASE("all numbers are same") {
     find_minmax({ 1, 1, 1, 1, 1, 1, 1, }, min, max);
     CHECK(min == 1);
     CHECK(max == 1);
+}
+    TEST_CASE("all numbers are same") {
+        double min = 0;
+        double max = 0;
+        CHECK(!find_minmax({}, min, max));
+    }
+
+TEST_CASE("histogram for exclusive variant is correct") {
+    std::fstream in, compare;
+    std::string line, compline;
+    bool flag = 0;
+    in.open("result.txt");
+    compare.open("compare.txt");
+    while (std::getline(in, line) && std::getline(compare, compline) && !flag) {
+        if (line != compline) {
+            flag = 1;
+        }
+    }
+    CHECK(flag == 0);
 }
diff --git a/unittest/cs-project3/x64/Debug/cs-project3.ilk b/unittest/cs-project3/x64/Debug/cs-project3.ilk
index ab39e02..1f31957 100644
Binary files a/unittest/cs-project3/x64/Debug/cs-project3.ilk and b/unittest/cs-project3/x64/Debug/cs-project3.ilk differ
diff --git a/unittest/cs-project3/x64/Debug/cs-project3.log b/unittest/cs-project3/x64/Debug/cs-project3.log
index 29e55bb..5639d80 100644
--- a/unittest/cs-project3/x64/Debug/cs-project3.log
+++ b/unittest/cs-project3/x64/Debug/cs-project3.log
@@ -1,2 +1,21 @@
-  unittest.cpp
-  cs-project3.vcxproj -> C:\Users\justygrass\Desktop\progs\2_sem\3la\cs-project3\unittest\x64\Debug\cs-project3.exe
+  histogram.cpp
+  unittest.cpp
+C:\Users\justygrass\Desktop\progs\2_sem\3la\cs-project3\unittest\cs-project3\doctest.h(1527,9): warning C4805: ==: небезопасное смешение типа "bool" и типа "T" в операции
+C:\Users\justygrass\Desktop\progs\2_sem\3la\cs-project3\unittest\cs-project3\doctest.h(1527,9): warning C4805:         with
+C:\Users\justygrass\Desktop\progs\2_sem\3la\cs-project3\unittest\cs-project3\doctest.h(1527,9): warning C4805:         [
+C:\Users\justygrass\Desktop\progs\2_sem\3la\cs-project3\unittest\cs-project3\doctest.h(1527,9): warning C4805:             T=int
+C:\Users\justygrass\Desktop\progs\2_sem\3la\cs-project3\unittest\cs-project3\doctest.h(1527,9): warning C4805:         ]
+  (компиляция исходного файла "unittest.cpp")
+  C:\Users\justygrass\Desktop\progs\2_sem\3la\cs-project3\unittest\cs-project3\doctest.h(1527,9):
+  контекст создания экземпляра шаблона (сначала самый старый)
+  	C:\Users\justygrass\Desktop\progs\2_sem\3la\cs-project3\unittest\cs-project3\unittest.cpp(47,5):
+  	выполняется компиляция ссылки на экземпляр шаблон функции "doctest::detail::Result doctest::detail::Expression_lhs<bool &>::operator ==<int>(R &&)"
+          with
+          [
+              R=int
+          ]
+  		C:\Users\justygrass\Desktop\progs\2_sem\3la\cs-project3\unittest\cs-project3\unittest.cpp(47,5):
+  		см. первую ссылку на "doctest::detail::Expression_lhs<bool &>::operator ==" в "DOCTEST_ANON_FUNC_13"
+  
+  Создание кода...
+C:\Users\justygrass\Desktop\progs\2_sem\3la\cs-project3\unittest\cs-project3\histogram.cpp(17,1): error C4716: find_minmax: должна возвращать значение
diff --git a/unittest/cs-project3/x64/Debug/cs-project3.tlog/CL.command.1.tlog b/unittest/cs-project3/x64/Debug/cs-project3.tlog/CL.command.1.tlog
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diff --git a/unittest/cs-project3/x64/Debug/cs-project3.tlog/CL.read.1.tlog b/unittest/cs-project3/x64/Debug/cs-project3.tlog/CL.read.1.tlog
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