diff --git a/2861_baochui/main.cpp b/2861_baochui/main.cpp
new file mode 100644
index 0000000..8ca9453
--- /dev/null
+++ b/2861_baochui/main.cpp
@@ -0,0 +1,54 @@
+#include <iostream>
+using namespace std;
+int main()
+{
+    int n,longa,longb;
+    int a[101]={0},b[101]={0};
+    cin>>n>>longa>>longb;
+    for(int i=1;i<=longa;i++){
+        cin>>a[i];
+    }
+    for(int i=1;i<=longb;i++){
+        cin>>b[i];
+    }
+    int nowa=0,nowb=0;
+    int ans=0;
+    for(int i=1;i<=n;i++){
+        nowa++;
+        nowb++;
+        if(nowa>longa){
+            nowa=1;
+        }
+        if(nowb>longb){
+            nowb=1;
+        }
+        int yi=a[nowa],er=b[nowb];
+        if(yi==0&&er==2){
+            ans++;
+        }
+        if(yi==2&&er==5){
+            ans++;
+        }
+        if(yi==5&&er==0){
+            ans++;
+        }
+        if(er==0&&yi==2){
+            ans--;
+        }
+        if(er==2&&yi==5){
+            ans--;
+        }
+        if(er==5&&yi==0){
+            ans--;
+        }
+    }
+    if(ans==0){
+        cout<<"draw";
+    }else{
+        if(ans>0){
+            cout<<"A";
+        }else{
+            cout<<"B";
+        }
+    }
+}
diff --git a/2865_deletenum/Readme.md b/2865_deletenum/Readme.md
new file mode 100644
index 0000000..b4f8d75
--- /dev/null
+++ b/2865_deletenum/Readme.md
@@ -0,0 +1,3 @@
+# 标题
+
+* 内容
\ No newline at end of file
diff --git a/2865_deletenum/doc/Readme.md b/2865_deletenum/doc/Readme.md
new file mode 100644
index 0000000..4e768b5
--- /dev/null
+++ b/2865_deletenum/doc/Readme.md
@@ -0,0 +1 @@
+# 
\ No newline at end of file
diff --git a/2865_deletenum/doc/鍒犳暟.pdf b/2865_deletenum/doc/鍒犳暟.pdf
new file mode 100644
index 0000000..1d3a5ae
Binary files /dev/null and b/2865_deletenum/doc/鍒犳暟.pdf differ
diff --git a/2865_deletenum/main.cpp b/2865_deletenum/main.cpp
new file mode 100644
index 0000000..1f6de66
--- /dev/null
+++ b/2865_deletenum/main.cpp
@@ -0,0 +1,26 @@
+#include <iostream>
+using namespace std;
+int maxs(int yi,int er){
+    return yi>er? yi:er;
+}
+int main()
+{
+    int n,a[101]={0};
+    cin>>n;
+    for(int i=1;i<=n;i++){
+        cin>>a[i];
+    }
+    int f[101]={0};
+    for(int i=1;i<=n;i++){
+        f[i]=f[i-1]+a[i];
+        for(int j=1;j<=n-2;j++){
+            int now=a[i]-a[j];
+            if(now<0){
+                now*=-1;
+            }
+            now=now*(i-j+1);
+            f[i]=maxs(f[i],f[j-1]+now);
+        }
+    }
+    cout<<f[n];
+}
diff --git a/2865_deletenum/main.exe b/2865_deletenum/main.exe
new file mode 100644
index 0000000..98ae617
Binary files /dev/null and b/2865_deletenum/main.exe differ
diff --git a/2865_deletenum/test/in.txt b/2865_deletenum/test/in.txt
new file mode 100644
index 0000000..4aaebfc
--- /dev/null
+++ b/2865_deletenum/test/in.txt
@@ -0,0 +1,2 @@
+17
+55 200 199 151 194 135 41 37 132 93 188 12 7 119 148 100 66
diff --git a/2865_deletenum/test/in2.txt b/2865_deletenum/test/in2.txt
new file mode 100644
index 0000000..ae23108
--- /dev/null
+++ b/2865_deletenum/test/in2.txt
@@ -0,0 +1,2 @@
+40
+11 139 177 146 141 124 121 58 120 73 92 15 184 41 53 166 158 75 27 159 122 109 112 74 200 116 171 8 114 13 55 81 194 47 102 165 56 130 9 95
diff --git a/2865_deletenum/test/in3.txt b/2865_deletenum/test/in3.txt
new file mode 100644
index 0000000..75b5728
--- /dev/null
+++ b/2865_deletenum/test/in3.txt
@@ -0,0 +1,2 @@
+50
+57 110 34 18 159 114 128 857 141 171 121 161 109 116 52 152 19 103 174 37 1 25 176 168 987 84 165 31 7 14 80 194 101 127 42 2 48 39 13 132 24 81 134 123 119 107 147 126 6 169
diff --git a/2865_deletenum/test/out.txt b/2865_deletenum/test/out.txt
new file mode 100644
index 0000000..320b6a3
--- /dev/null
+++ b/2865_deletenum/test/out.txt
@@ -0,0 +1,18 @@
+## z:\Chao\src\2865_deletenum\test\in.txt 
+2020/05/02 周六 18:34:11.05 
+2835
+-----------------------------------------------
+Process exited after 150 ms with return value 0
+
+## z:\Chao\src\2865_deletenum\test\in2.txt 
+2020/05/02 周六 18:34:11.05 
+7042
+-----------------------------------------------
+Process exited after 90 ms with return value 0
+
+## z:\Chao\src\2865_deletenum\test\in3.txt 
+2020/05/02 周六 18:34:11.05 
+38302
+-----------------------------------------------
+Process exited after 90 ms with return value 0
+