diff --git a/4062_dui/dui.cpp b/4062_dui/dui.cpp
index 790561f..67193a9 100644
--- a/4062_dui/dui.cpp
+++ b/4062_dui/dui.cpp
@@ -1,5 +1,13 @@
 #include<iostream>
 using namespace std;
+bool bi(int f[],int n,int j){
+    for(int i=1;i<=j;i++){
+        if(f[i]==n){
+            return 0;
+        }
+    }
+    return 1;
+}
 int main(){
     int n,a[1001]={0},f[1001]={0};
     int pan=0;
@@ -10,8 +18,9 @@ int main(){
     for(int i=a[1]-1;i>0;i--){
         f[1]=i;
         for(int j=2;j<=n;j++){
-            if(a[j-1]-f[j-1]>0){
-                f[j]=a[j-1]-f[j-1];
+            int we=a[j-1]-f[j-1];
+            if(we>0&bi(f,we,j-1)==1){
+                f[j]=we;
                 pan=j;
             }else{
                 break;
diff --git a/4062_dui/dui.exe b/4062_dui/dui.exe
index 6f7aac7..38bd7ef 100644
Binary files a/4062_dui/dui.exe and b/4062_dui/dui.exe differ
diff --git a/4062_dui/test/out.txt b/4062_dui/test/out.txt
index 71f8eb2..c29fa38 100644
--- a/4062_dui/test/out.txt
+++ b/4062_dui/test/out.txt
@@ -1,24 +1,24 @@
 ## z:\Chao\src\4062_dui\test\in.txt 
-2020/03/28 周六  9:35:42.10 
+2020/03/28 周六 11:44:37.03 
 
 -----------------------------------------------
-Process exited after 140 ms with return value 0
+Process exited after 200 ms with return value 0
 
 ## z:\Chao\src\4062_dui\test\In0 (6).txt 
-2020/03/28 周六  9:35:42.10 
+2020/03/28 周六 11:44:37.03 
 3 1 5 2 4 
 -----------------------------------------------
-Process exited after 130 ms with return value 0
+Process exited after 90 ms with return value 0
 
 ## z:\Chao\src\4062_dui\test\In1 (9).txt 
-2020/03/28 周六  9:35:42.10 
+2020/03/28 周六 11:44:37.03 
 4 2 3 1 6 5 
 -----------------------------------------------
-Process exited after 100 ms with return value 0
+Process exited after 90 ms with return value 0
 
 ## z:\Chao\src\4062_dui\test\In2 (1).txt 
-2020/03/28 周六  9:35:42.10 
-6 5 2 2 5 1 8 
+2020/03/28 周六 11:44:37.03 
+5 6 1 3 4 2 7 
 -----------------------------------------------
-Process exited after 80 ms with return value 0
+Process exited after 150 ms with return value 0