diff --git a/src/main/java/com/cool/ling_cha_mount/sliding_windows/Num1343.java b/src/main/java/com/cool/ling_cha_mount/sliding_windows/Num1343.java
new file mode 100644
index 0000000..dc77982
--- /dev/null
+++ b/src/main/java/com/cool/ling_cha_mount/sliding_windows/Num1343.java
@@ -0,0 +1,33 @@
+package com.cool.ling_cha_mount.sliding_windows;
+
+/**
+ * Created with IntelliJ IDEA.
+ *
+ * @Author: Cool
+ * @Date: 2024/10/04/17:28
+ * @Description: 1343. 大小为 K 且平均值大于等于阈值的子数组数目
+ * DayNumber 1
+ * Hard 2
+ * Level 3
+ * Score 1317
+ */
+public class Num1343 {
+    public int numOfSubarrays(int[] arr, int k, int threshold) {
+        int res=0;
+        int sum=0;
+        for(int i=0;i<k;i++){
+            sum+=arr[i];
+        }
+        if(sum>=k*threshold){
+            res++;
+        }
+        for(int i=k;i<arr.length;i++){
+            sum-=arr[i-k];
+            sum+=arr[i];
+            if(sum>=k*threshold){
+                res++;
+            }
+        }
+        return res;
+    }
+}