tree
‘Head First’ Style Data Structures & Algorithms Book? [closed]
The Algorithm Design Manual by Steve Skiena isn’t exactly a barrel of laughs, but it’s relatively light on the deeper mathematics and contains lots of what he calls “War Stories”, which are illustrative examples from real world situations where algorithm work really paid off (or, sometimes, totally failed). He’s also got his audio and video … Read more
Difference between PriorityQueue and TreeSet in Java? [duplicate]
When you want a queue, use a PriorityQueue. When you want a Set, use a TreeSet. A TreeSet has unique elements, and doesn’t offer the API of a Queue. A Queue doesn’t offer the API of a Set, and allows multiple equal elements.
Fenwick tree vs Segment tree
I read this on Quora. Hope you find it useful. There are things that a segment tree can do but a BIT cannot : A BIT essentially works with cumulative quantities. When the cumulative quantity for interval [i..j] is required, it is found as the difference between cumulative quantities for [1…j] and [1…i-1]. This works … Read more
What is the difference between depth and height in a tree?
I learned that depth and height are properties of a node: The depth of a node is the number of edges from the node to the tree’s root node.A root node will have a depth of 0. The height of a node is the number of edges on the longest path from the node to … Read more
Output of tree in command prompt
Tree accepts only a few command line parameters: c:\>Tree /? Graphically displays the folder structure of a drive or path. TREE [drive:][path] [/F] [/A] /F Display the names of the files in each folder. /A Use ASCII instead of extended characters. None of the indicated parameters are a file mask or filter. You can use … Read more
Finding all parents in mysql table with single query (Recursive Query)
SELECT T2.id, T2.title,T2.controller,T2.method,T2.url FROM ( SELECT @r AS _id, (SELECT @r := parent_id FROM menu WHERE id = _id) AS parent_id, @l := @l + 1 AS lvl FROM (SELECT @r := 31, @l := 0) vars, menu m WHERE @r <> 0) T1 JOIN menu T2 ON T1._id = T2.id ORDER BY T1.lvl DESC; … Read more
Display complete dependency tree with Leiningen
You can generate Maven’s POM out of Leiningen’s project definition and then use Maven’s dependency:tree plugin with a verbose option, like this: $ lein pom $ mvn dependency:tree -Dverbose=true This will list dependencies omitted for various reasons, e.g.: | +- ring:ring-core:jar:1.4.0:compile | | +- (org.clojure:clojure:jar:1.5.1:compile – omitted for conflict with 1.7.0) | | +- (org.clojure:tools.reader:jar:0.9.1:compile … Read more
How is the memory of the array of segment tree 2 * 2 ^(ceil(log(n))) – 1?
What is happening here is, if you have an array of n elements, then the segment tree will have a leaf node for each of these n entries. Thus, we have (n) leaf nodes, and also (n-1) internal nodes. Total number of nodes= n + (n-1) = 2n-1 Now, we know its a full binary … Read more
How to Serialize Binary Tree
All those articles talk mostly about the serialization part. The deserialization part is slightly tricky to do in one pass. I have implemented an efficient solution for deserialization too. Problem: Serialize and Deserialize a binary tree containing positive numbers. Serialization part: Use 0 to represent null. Serialize to list of integers using preorder traversal. Deserialization … Read more