diff --git a/2717_duijue/Readme.md b/2717_duijue/Readme.md
new file mode 100644
index 0000000..b4f8d75
--- /dev/null
+++ b/2717_duijue/Readme.md
@@ -0,0 +1,3 @@
+# 标题
+
+* 内容
\ No newline at end of file
diff --git a/2717_duijue/doc/Readme.md b/2717_duijue/doc/Readme.md
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index 0000000..4e768b5
--- /dev/null
+++ b/2717_duijue/doc/Readme.md
@@ -0,0 +1 @@
+# 
\ No newline at end of file
diff --git a/2717_duijue/doc/瀵瑰喅.pdf b/2717_duijue/doc/瀵瑰喅.pdf
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index 0000000..c649e4e
Binary files /dev/null and b/2717_duijue/doc/瀵瑰喅.pdf differ
diff --git a/2717_duijue/main.cpp b/2717_duijue/main.cpp
new file mode 100644
index 0000000..224edfe
--- /dev/null
+++ b/2717_duijue/main.cpp
@@ -0,0 +1,36 @@
+#include <iostream>
+#include <cstdio>
+using namespace std;
+int main()
+{
+    int ge,sai,pan[101]={0};
+    bool a[101][101]={0};
+    scanf("%d%d",&ge,&sai);
+    for(int i=1;i<=sai;i++){
+        int yin,shu;
+        scanf("%d%d",&yin,&shu);
+        a[shu][yin]=1;
+    }
+    for(int i=1;i<=ge;i++){
+        int now=1;
+        for(int j=1;j<=ge;j++){
+            if(a[i][j]==1){
+                now++;
+            }            
+        }
+        if(pan[now]==0){
+            pan[now]=1;
+        }else{
+            pan[now]=-1;
+            cout<<i<<" "<<now<<endl;
+        }
+    }
+    int ans=0;
+    for(int i=1;i<=ge;i++)
+    {
+        if(pan[i]==1){
+            ans++;
+        }
+    }
+    printf("%d",ans);
+}
diff --git a/2717_duijue/main.exe b/2717_duijue/main.exe
new file mode 100644
index 0000000..0b74a03
Binary files /dev/null and b/2717_duijue/main.exe differ
diff --git a/2717_duijue/test/in.txt b/2717_duijue/test/in.txt
new file mode 100644
index 0000000..b733add
--- /dev/null
+++ b/2717_duijue/test/in.txt
@@ -0,0 +1,6 @@
+5 5
+4 3
+4 2
+3 2
+1 2
+2 5
diff --git a/2717_duijue/test/in2.txt b/2717_duijue/test/in2.txt
new file mode 100644
index 0000000..e69de29
diff --git a/2717_duijue/test/in3.txt b/2717_duijue/test/in3.txt
new file mode 100644
index 0000000..e69de29
diff --git a/2717_duijue/test/out.txt b/2717_duijue/test/out.txt
new file mode 100644
index 0000000..1c70784
--- /dev/null
+++ b/2717_duijue/test/out.txt
@@ -0,0 +1,20 @@
+## z:\Chao\src\2717_duijue\test\in.txt 
+2020/05/03 周日 19:33:37.73 
+4 1
+5 2
+1
+-----------------------------------------------
+Process exited after 180 ms with return value 0
+
+## z:\Chao\src\2717_duijue\test\in2.txt 
+2020/05/03 周日 19:33:37.73 
+
+-----------------------------------------------
+Process exited after 70 ms with return value -1073741819
+
+## z:\Chao\src\2717_duijue\test\in3.txt 
+2020/05/03 周日 19:33:37.73 
+
+-----------------------------------------------
+Process exited after 70 ms with return value -1073741819
+