diff --git a/src/main/java/com/cool/ling_cha_mount/dp/Num377.java b/src/main/java/com/cool/ling_cha_mount/dp/Num377.java
new file mode 100644
index 0000000..80e2e0d
--- /dev/null
+++ b/src/main/java/com/cool/ling_cha_mount/dp/Num377.java
@@ -0,0 +1,16 @@
+package com.cool.ling_cha_mount.dp;
+
+public class Num377 {
+    public int combinationSum4(int[] nums, int target) {
+        int[] dp=new int[target+1];
+        dp[0]=1;
+        for(int i=1;i<dp.length;i++){
+            for(int num:nums){
+                if(num<=i){
+                    dp[i]+=dp[i-num];
+                }
+            }
+        }
+        return dp[target];
+    }
+}