diff --git a/2862_cow/Readme.md b/2862_cow/Readme.md
new file mode 100644
index 0000000..b4f8d75
--- /dev/null
+++ b/2862_cow/Readme.md
@@ -0,0 +1,3 @@
+# ����
+
+* ����
\ No newline at end of file
diff --git a/2862_cow/doc/Readme.md b/2862_cow/doc/Readme.md
new file mode 100644
index 0000000..4e768b5
--- /dev/null
+++ b/2862_cow/doc/Readme.md
@@ -0,0 +1 @@
+# 
\ No newline at end of file
diff --git a/2862_cow/doc/麻烦的聚餐.pdf b/2862_cow/doc/麻烦的聚餐.pdf
new file mode 100644
index 0000000..6485af1
Binary files /dev/null and b/2862_cow/doc/麻烦的聚餐.pdf differ
diff --git a/2862_cow/main.cpp b/2862_cow/main.cpp
new file mode 100644
index 0000000..08219e0
--- /dev/null
+++ b/2862_cow/main.cpp
@@ -0,0 +1,61 @@
+#include <iostream>
+using namespace std;
+int mins(int yi,int er){
+    return yi<er? yi:er;
+}
+int main()
+{
+    int n,a[30001]={0};
+    cin>>n;
+    for(int i=1;i<=n;i++){
+        cin>>a[i];
+    }
+    int f[30001][4]={0};
+    for(int i=1;i<=n;i++){
+        for(int j=1;j<=3;j++){
+            if(j>i){
+                for(int k=j;k<=3;k++){
+                    f[i][k]=f[i][j-1];
+                }
+                break;
+            }
+            bool bian=0;
+            if(a[i]!=j){
+                bian=1;
+            }
+            int last=j-1;
+            if(j-1<1) last=j;
+            int last2=j-2;
+            if(j-2<1) last2=j;
+            f[i][j]=mins(f[i-1][last]+bian,f[i-1][j]+bian);
+            f[i][j]=mins(f[i-1][last2]+bian,f[i][j]);
+            // cout<<f[i][j]<<" ";
+        }
+        // cout<<endl;
+    }
+    int ans=mins(mins(f[n][1],f[n][2]),f[n][3]);
+    int h[30001][4]={0};
+    for(int i=1;i<=n;i++){
+        // cout<<endl;
+        for(int j=3;j>=1;j--){
+            if(3-j+1>i){
+                for(int k=j;k>=1;k--){
+                    h[i][k]=h[i][j-1];
+                }
+                break;
+            }
+            bool bian=0;
+            if(a[i]!=j){
+                bian=1;
+            }
+            int last=j+1;
+            if(j+1>3) last=j;
+            int last2=j+2;
+            if(j+2>3) last2=j;
+            h[i][j]=mins(h[i-1][last]+bian,h[i-1][j]+bian);
+            h[i][j]=mins(h[i-1][last2]+bian,h[i][j]);
+            // cout<<h[i][j]<<" ";
+        }
+    }
+    cout<<mins(mins(h[n][2],h[n][3]),mins(ans,h[n][1]));
+}
diff --git a/2862_cow/main.exe b/2862_cow/main.exe
new file mode 100644
index 0000000..2176b0c
Binary files /dev/null and b/2862_cow/main.exe differ
diff --git a/2862_cow/test/in.txt b/2862_cow/test/in.txt
new file mode 100644
index 0000000..5dd9a99
--- /dev/null
+++ b/2862_cow/test/in.txt
@@ -0,0 +1,6 @@
+5
+1
+3
+2
+1
+1
\ No newline at end of file
diff --git a/2862_cow/test/in2.txt b/2862_cow/test/in2.txt
new file mode 100644
index 0000000..77a5856
--- /dev/null
+++ b/2862_cow/test/in2.txt
@@ -0,0 +1,6 @@
+5
+3
+1
+3
+2
+1
diff --git a/2862_cow/test/in3.txt b/2862_cow/test/in3.txt
new file mode 100644
index 0000000..3f33156
--- /dev/null
+++ b/2862_cow/test/in3.txt
@@ -0,0 +1,11 @@
+10
+3
+2
+2
+2
+2
+2
+3
+2
+2
+2
diff --git a/2862_cow/test/out.txt b/2862_cow/test/out.txt
new file mode 100644
index 0000000..5d208b9
--- /dev/null
+++ b/2862_cow/test/out.txt
@@ -0,0 +1,18 @@
+## z:\Chao\src\2862_cow\test\in.txt 
+2020/05/02 ���� 21:37:42.79 
+1
+-----------------------------------------------
+Process exited after 150 ms with return value 0
+
+## z:\Chao\src\2862_cow\test\in2.txt 
+2020/05/02 ���� 21:37:42.79 
+1
+-----------------------------------------------
+Process exited after 100 ms with return value 0
+
+## z:\Chao\src\2862_cow\test\in3.txt 
+2020/05/02 ���� 21:37:42.79 
+1
+-----------------------------------------------
+Process exited after 100 ms with return value 0
+