diff --git a/src/main/java/com/cool/hot100/binary_tree/Num102.java b/src/main/java/com/cool/hot100/binary_tree/Num102.java
new file mode 100644
index 0000000..b1d4ae8
--- /dev/null
+++ b/src/main/java/com/cool/hot100/binary_tree/Num102.java
@@ -0,0 +1,21 @@
+package com.cool.hot100.binary_tree;
+
+import java.util.List;
+
+/**
+ * Created with IntelliJ IDEA.
+ *
+ * @Author: Cool
+ * @Date: 2024/08/28/17:24
+ * DayNumber 4
+ * Hard 2
+ * Level ?
+ */
+public class Num102 {
+
+
+    public List<List<Integer>> levelOrder(TreeNode root) {
+
+    }
+
+}
diff --git a/src/main/java/com/cool/one_question_per_day/LeetCode20240829.java b/src/main/java/com/cool/one_question_per_day/LeetCode20240829.java
new file mode 100644
index 0000000..db565b4
--- /dev/null
+++ b/src/main/java/com/cool/one_question_per_day/LeetCode20240829.java
@@ -0,0 +1,15 @@
+package com.cool.one_question_per_day;
+
+/**
+ * Created with IntelliJ IDEA.
+ *
+ * @Author: Cool
+ * @Date 2024/08/29
+ * DayNumber 1
+ * Hard 1
+ */
+public class LeetCode20240829 {
+    public boolean satisfiesConditions(int[][] grid) {
+
+    }
+}