diff --git a/3069_includesushu/new4.24.cpp b/3069_includesushu/new4.24.cpp
new file mode 100644
index 0000000..aaf1957
--- /dev/null
+++ b/3069_includesushu/new4.24.cpp
@@ -0,0 +1,22 @@
+#include <iostream>
+#include <algorithm>
+using namespace std;
+bool pan[1000001]={0};
+int main()
+{
+    int begn, ends;
+    cin >> begn >> ends;
+    for (int i = 2; i * i <= ends; i++) {
+        for(int j=ends/i;i*j>=begn&&j!=1;j--){
+            pan[i*j-begn]=1;
+        }
+    }
+    int ans=0;
+    for(int i=0;i<=ends-begn;i++){
+        if(pan[i]==0){
+            ans++;
+            //cout<<begn+i<<" ";
+        }
+    }
+    cout<<ans;
+}
diff --git a/3069_includesushu/new4.24.exe b/3069_includesushu/new4.24.exe
new file mode 100644
index 0000000..d5bca5f
Binary files /dev/null and b/3069_includesushu/new4.24.exe differ
diff --git a/3069_includesushu/test/in3.txt b/3069_includesushu/test/in3.txt
index e69de29..47ac654 100644
--- a/3069_includesushu/test/in3.txt
+++ b/3069_includesushu/test/in3.txt
@@ -0,0 +1 @@
+2000000 2009999
diff --git a/3069_includesushu/test/out.txt b/3069_includesushu/test/out.txt
index 9db0bbf..51dc7dc 100644
--- a/3069_includesushu/test/out.txt
+++ b/3069_includesushu/test/out.txt
@@ -1,18 +1,18 @@
 ## z:\Chao\src\3069_includesushu\test\in.txt 
-2020/04/19 周日 11:36:55.94 
-4
+2020/04/24 周五 18:49:17.02 
+5
 -----------------------------------------------
-Process exited after 220 ms with return value 0
+Process exited after 160 ms with return value 0
 
 ## z:\Chao\src\3069_includesushu\test\in2.txt 
-2020/04/19 周日 11:36:55.94 
-262
+2020/04/24 周五 18:49:17.02 
+69
+-----------------------------------------------
+Process exited after 80 ms with return value 0
+
+## z:\Chao\src\3069_includesushu\test\in3.txt 
+2020/04/24 周五 18:49:17.02 
+705
 -----------------------------------------------
 Process exited after 90 ms with return value 0
 
-## z:\Chao\src\3069_includesushu\test\in3.txt 
-2020/04/19 周日 11:36:55.94 
--7083472
------------------------------------------------
-Process exited after 70 ms with return value 0
-