diff --git a/练习及笔记.cpp b/练习及笔记.cpp
new file mode 100644
index 0000000..6646755
--- /dev/null
+++ b/练习及笔记.cpp
@@ -0,0 +1,40 @@
+#include<iostream>
+#include<bits/stdc++.h>
+using namespace std;
+int add(int a,int b)
+{
+    int sum=0;
+    if(a+3<=b)
+        sum++;
+    if(a-3>=1)
+        sum++;
+    return sum+1;
+}
+int cdd(int a,int b)
+{
+    int sum=0;
+    if(a+3<=b)
+        sum--;
+    if(a-3>=1)
+        sum--;
+    return sum-1;
+}
+int main()
+{
+    int m,q,op,num,sum=0;
+    cin>>m>>q;
+    for(int i=0;i<q;i++)
+    {
+        cin>>op>>num;
+        if(op==1)
+        {
+            sum+=add(num,m);
+        }
+        if(op==2)
+        {
+            sum+=cdd(num,m);
+        }
+        cout<<sum<<endl;
+    }
+    return 0;
+}