diff --git a/Alogrithm/.vs/Alogrithm/v16/.suo b/Alogrithm/.vs/Alogrithm/v16/.suo
index ef128af..88ad43f 100644
Binary files a/Alogrithm/.vs/Alogrithm/v16/.suo and b/Alogrithm/.vs/Alogrithm/v16/.suo differ
diff --git a/Alogrithm/Alogrithm/Alogrithm.vcxproj b/Alogrithm/Alogrithm/Alogrithm.vcxproj
index 29b9647..0733cea 100644
--- a/Alogrithm/Alogrithm/Alogrithm.vcxproj
+++ b/Alogrithm/Alogrithm/Alogrithm.vcxproj
@@ -145,6 +145,7 @@
     <ClCompile Include="src\3_bool IsUgly.cpp" />
     <ClCompile Include="src\4_IsPalindrome.cpp" />
     <ClCompile Include="src\5_MinDepth.cpp" />
+    <ClCompile Include="src\6_ContainsDuplicate.cpp" />
     <ClCompile Include="src\main.cpp" />
   </ItemGroup>
   <ItemGroup>
@@ -153,6 +154,7 @@
     <ClInclude Include="include\3_bool IsUgly.h" />
     <ClInclude Include="include\4_IsPalindrome.h" />
     <ClInclude Include="include\5_MinDepth.h" />
+    <ClInclude Include="include\6_ContainsDuplicate.h" />
   </ItemGroup>
   <ItemGroup>
     <None Include="config\1_ContainsNearbyDuplicate.ini" />
@@ -160,6 +162,7 @@
     <None Include="config\3_bool IsUgly.ini" />
     <None Include="config\4_IsPalindrome.ini" />
     <None Include="config\5_MinDepth.ini" />
+    <None Include="config\6_ContainsDuplicate.ini" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
diff --git a/Alogrithm/Alogrithm/Alogrithm.vcxproj.filters b/Alogrithm/Alogrithm/Alogrithm.vcxproj.filters
index 3d3b3bc..34e6ca5 100644
--- a/Alogrithm/Alogrithm/Alogrithm.vcxproj.filters
+++ b/Alogrithm/Alogrithm/Alogrithm.vcxproj.filters
@@ -42,6 +42,9 @@
     <ClCompile Include="src\5_MinDepth.cpp">
       <Filter>源文件\src</Filter>
     </ClCompile>
+    <ClCompile Include="src\6_ContainsDuplicate.cpp">
+      <Filter>源文件\src</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="include\2_ExcelSheetColumnTitle.h">
@@ -59,6 +62,9 @@
     <ClInclude Include="include\5_MinDepth.h">
       <Filter>头文件\include</Filter>
     </ClInclude>
+    <ClInclude Include="include\6_ContainsDuplicate.h">
+      <Filter>头文件\include</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <None Include="config\3_bool IsUgly.ini">
@@ -76,5 +82,8 @@
     <None Include="config\5_MinDepth.ini">
       <Filter>资源文件\config</Filter>
     </None>
+    <None Include="config\6_ContainsDuplicate.ini">
+      <Filter>资源文件\config</Filter>
+    </None>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/Alogrithm/Alogrithm/config/6_ContainsDuplicate.ini b/Alogrithm/Alogrithm/config/6_ContainsDuplicate.ini
index e69de29..b701c4a 100644
--- a/Alogrithm/Alogrithm/config/6_ContainsDuplicate.ini
+++ b/Alogrithm/Alogrithm/config/6_ContainsDuplicate.ini
@@ -0,0 +1,21 @@
+[test1]
+input=1,2,3,1
+output=1
+[test2]
+input=1,2,3,4,5,6
+output=0
+[test3]
+input=1,2,3,4,5,2
+output=1
+[test4]
+input=3,3,3,3,3
+output=1
+[test5]
+input=0,0,0,0
+output=1
+[test6]
+input=1,8,3,9
+output=0
+[test7]
+input=214748367,-214748368,-214748368
+output=1
\ No newline at end of file
diff --git a/Alogrithm/Alogrithm/include/6_ContainsDuplicate.h b/Alogrithm/Alogrithm/include/6_ContainsDuplicate.h
index e69de29..68d6144 100644
--- a/Alogrithm/Alogrithm/include/6_ContainsDuplicate.h
+++ b/Alogrithm/Alogrithm/include/6_ContainsDuplicate.h
@@ -0,0 +1,5 @@
+#pragma once
+#include <math.h>
+#include <stdlib.h>
+int cmp_6(const void* _a, const void* _b);
+bool containsDuplicate(int* nums, int numsSize);
\ No newline at end of file
diff --git a/Alogrithm/Alogrithm/src/6_ContainsDuplicate.cpp b/Alogrithm/Alogrithm/src/6_ContainsDuplicate.cpp
index e69de29..e3cf1be 100644
--- a/Alogrithm/Alogrithm/src/6_ContainsDuplicate.cpp
+++ b/Alogrithm/Alogrithm/src/6_ContainsDuplicate.cpp
@@ -0,0 +1,16 @@
+#include"../include/6_ContainsDuplicate.h"
+
+int cmp_6(const void* _a, const void* _b) {
+	int a = *(int*)_a, b = *(int*)_b;
+	return a - b;
+}
+//6.���򣬱Ƚ�����Ԫ���Ƿ���ȣ�������򷵻�true�����򷵻�false��
+bool containsDuplicate(int* nums, int numsSize) {
+	qsort(nums, numsSize, sizeof(int), cmp_6);
+	for (int i = 0; i < numsSize - 1; i++) {
+		if (nums[i] == nums[i + 1]) {
+			return true;
+		}
+	}
+	return false;
+}
\ No newline at end of file
diff --git a/Alogrithm/UnitTest/UnitTest.cpp b/Alogrithm/UnitTest/UnitTest.cpp
index 7fc0a00..68f3a8b 100644
--- a/Alogrithm/UnitTest/UnitTest.cpp
+++ b/Alogrithm/UnitTest/UnitTest.cpp
@@ -7,6 +7,7 @@ using namespace Microsoft::VisualStudio::CppUnitTestFramework;
 #define FileName_3  "../Alogrithm/config/3_bool IsUgly.ini"
 #define FileName_4  "../Alogrithm/config/4_IsPalindrome.ini"
 #define FileName_5  "../Alogrithm/config/5_MinDepth.ini"
+#define FileName_6  "../Alogrithm/config/6_ContainsDuplicate.ini"
 
 namespace UnitTest
 {
@@ -93,4 +94,22 @@ namespace UnitTest
 			}
 		}
 	};
+	TEST_CLASS(UnitTest_6)
+	{
+		TEST_METHOD(TestMethode1)
+		{
+			char Section_Name[100][10] = { 0 };
+			int  Section_Count = CalcCount(100, Section_Name, FileName_6);
+			int array_count = 0;
+			int* Section_Value;
+			CString Na, Nb, nExpect;
+			for (int i = 0; i < Section_Count; i++) {
+				GetPrivateProfileString(Section_Name[i], "input", " ", Na.GetBuffer(200), 200, FileName_6);
+				GetPrivateProfileString(Section_Name[i], "output", " ", nExpect.GetBuffer(20), 20, FileName_6);
+				Section_Value = str_device(Na, &array_count);
+				bool nReal = containsDuplicate(Section_Value, array_count);
+				Assert::AreEqual(nReal, CstrToBool(nExpect));
+			}
+		}
+	};
 }
diff --git a/Alogrithm/UnitTest/UnitTest.vcxproj b/Alogrithm/UnitTest/UnitTest.vcxproj
index aa3f479..5284fc8 100644
--- a/Alogrithm/UnitTest/UnitTest.vcxproj
+++ b/Alogrithm/UnitTest/UnitTest.vcxproj
@@ -103,7 +103,7 @@
       <SubSystem>Windows</SubSystem>
       <AdditionalLibraryDirectories>$(VCInstallDir)UnitTest\lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
       <GenerateDebugInformation>DebugFull</GenerateDebugInformation>
-      <AdditionalDependencies>../Alogrithm/Debug/1_ContainsNearbyDuplicate.obj;../Alogrithm/Debug/2_ExcelSheetColumnTitle.obj;../Alogrithm/Debug/3_bool IsUgly.obj;../Alogrithm/Debug/4_IsPalindrome.obj;../Alogrithm/Debug/5_MinDepth.obj;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>../Alogrithm/Debug/1_ContainsNearbyDuplicate.obj;../Alogrithm/Debug/2_ExcelSheetColumnTitle.obj;../Alogrithm/Debug/3_bool IsUgly.obj;../Alogrithm/Debug/4_IsPalindrome.obj;../Alogrithm/Debug/5_MinDepth.obj;../Alogrithm/Debug/6_ContainsDuplicate.obj;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
diff --git a/Alogrithm/UnitTest/pch.h b/Alogrithm/UnitTest/pch.h
index 01f0539..55a32ff 100644
--- a/Alogrithm/UnitTest/pch.h
+++ b/Alogrithm/UnitTest/pch.h
@@ -18,6 +18,7 @@
 #include"../Alogrithm/include/3_bool IsUgly.h"
 #include"../Alogrithm/include/4_IsPalindrome.h"
 #include"../Alogrithm/include/5_MinDepth.h"
+#include"../Alogrithm/include/6_ContainsDuplicate.h"