diff --git a/.gitignore b/.gitignore
index 0224226..83092eb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -49,3 +49,5 @@ Alogrithm/Alogrithm/Debug/Alogrithm.tlog/link.write.1.tlog
 Alogrithm/Debug/Alogrithm.exe
 Alogrithm/Debug/Alogrithm.ilk
 Alogrithm/Debug/Alogrithm.pdb
+Alogrithm/.vs/Alogrithm/v16/ipch/AutoPCH/7845411b3bb098f4/3_BOOL ISUGLY.ipch
+Alogrithm/Alogrithm/Debug/3_bool IsUgly.obj
diff --git a/Alogrithm/.vs/Alogrithm/v16/.suo b/Alogrithm/.vs/Alogrithm/v16/.suo
index a393433..544735b 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 b8069ed..8762563 100644
--- a/Alogrithm/Alogrithm/Alogrithm.vcxproj
+++ b/Alogrithm/Alogrithm/Alogrithm.vcxproj
@@ -141,11 +141,16 @@
   <ItemGroup>
     <ClCompile Include="src\1_ContainsNearbyDuplicate.cpp" />
     <ClCompile Include="src\2_ExcelSheetColumnTitle.cpp" />
+    <ClCompile Include="src\3_bool IsUgly.cpp" />
     <ClCompile Include="src\main.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="include\1_ContainsNearbyDuplicate.h" />
     <ClInclude Include="include\2_ExcelSheetColumnTitle.h" />
+    <ClInclude Include="include\3_bool IsUgly.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="config\3_bool IsUgly.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 5f38754..f43ee80 100644
--- a/Alogrithm/Alogrithm/Alogrithm.vcxproj.filters
+++ b/Alogrithm/Alogrithm/Alogrithm.vcxproj.filters
@@ -33,6 +33,9 @@
     <ClCompile Include="src\1_ContainsNearbyDuplicate.cpp">
       <Filter>源文件\src</Filter>
     </ClCompile>
+    <ClCompile Include="src\3_bool IsUgly.cpp">
+      <Filter>源文件\src</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="include\2_ExcelSheetColumnTitle.h">
@@ -41,5 +44,13 @@
     <ClInclude Include="include\1_ContainsNearbyDuplicate.h">
       <Filter>头文件\include</Filter>
     </ClInclude>
+    <ClInclude Include="include\3_bool IsUgly.h">
+      <Filter>头文件\include</Filter>
+    </ClInclude>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="config\3_bool IsUgly.ini">
+      <Filter>资源文件\config</Filter>
+    </None>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/Alogrithm/Alogrithm/config/3_bool IsUgly.ini b/Alogrithm/Alogrithm/config/3_bool IsUgly.ini
new file mode 100644
index 0000000..e69de29
diff --git a/Alogrithm/Alogrithm/include/3_bool IsUgly.h b/Alogrithm/Alogrithm/include/3_bool IsUgly.h
new file mode 100644
index 0000000..e051f80
--- /dev/null
+++ b/Alogrithm/Alogrithm/include/3_bool IsUgly.h	
@@ -0,0 +1,2 @@
+#pragma once
+bool IsUgly(int num);
\ No newline at end of file
diff --git a/Alogrithm/Alogrithm/src/3_bool IsUgly.cpp b/Alogrithm/Alogrithm/src/3_bool IsUgly.cpp
new file mode 100644
index 0000000..b18b055
--- /dev/null
+++ b/Alogrithm/Alogrithm/src/3_bool IsUgly.cpp	
@@ -0,0 +1,27 @@
+#include <stdio.h>
+#include "../include/3_bool IsUgly.h "  
+//�ж�һ�����Ƿ�Ϊ�������ܱ�2 3 5�������������ܷ���true�����ܷ���false
+bool IsUgly(int num)
+{	//����жϣ����С�ڵ���0ֱ�ӷ���false
+	if (num <= 0) {
+		return false;
+	}
+	while (1) {//��numѭ���жϲ�����Ӧ�����㣬ֱ�������������������˳�ѭ��
+		if (num % 2 == 0) {
+			num = num / 2;
+		}
+		else if (num % 3 == 0) {
+			num = num / 3;
+		}
+		else if (num % 5 == 0) {
+			num = num / 5;
+		}
+		else {
+			break;
+		}
+	}
+	if (num == 1) {//������num�жϣ����Ϊ1��˵���ܱ��������dz����������dz�������false
+		return true;
+	}
+	return false;
+}
\ No newline at end of file
diff --git a/Alogrithm/Alogrithm/src/main.cpp b/Alogrithm/Alogrithm/src/main.cpp
index c26c671..e5da2e0 100644
--- a/Alogrithm/Alogrithm/src/main.cpp
+++ b/Alogrithm/Alogrithm/src/main.cpp
@@ -1,6 +1,8 @@
 #include "../include/2_ExcelSheetColumnTitle.h"
+#include "../include/3_bool IsUgly.h"
 int main()
 {
-	ExcelSheetColumnTitle(10);
+	//ExcelSheetColumnTitle(10);
+	printf("%d\n", IsUgly(6));
 	return 0;
 }
\ No newline at end of file