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New Problem: kth max & min in BST #62
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05184c4
update: find k-th max in BST
ashokdey 4a75147
update: entry in readme
ashokdey 93af26e
Merge branch 'master' of github.com:knaxus/problem-solving-javascript...
ashokdey f376135
fix: closing of `<sup>`
ashokdey 0ff8d47
fix: typo error
ashokdey 0bf9860
update: find kth min & throw error for invalid K
ashokdey 4980e96
Merge branch 'problems' of github.com:knaxus/problem-solving-javascri...
ashokdey ca93db3
update: entry in README & folder rename
ashokdey b4507f1
update: rename folder and fix condition for K
ashokdey ab8b038
update: fix entries in readme
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38 changes: 38 additions & 0 deletions
src/_DataStructures_/Trees/BinarySearchTree/find-kth-max/index.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| const BST = require('../index'); | ||
|
|
||
| // Inorder traversal returns a sorted array | ||
| function inOrderTraversal(root) { | ||
| if (root === null) return []; | ||
| let arr = []; | ||
| // traverse left | ||
| const left = inOrderTraversal(root.leftChild); | ||
| arr = [...left, root.value]; | ||
| const right = inOrderTraversal(root.rightChild); | ||
| return [...arr, ...right]; | ||
| } | ||
|
|
||
| function findKthMax(rootNode, k) { | ||
| const arr = inOrderTraversal(rootNode); | ||
| if (k <= 0 || k > arr.lenth) { | ||
| throw new Error('Invalid value for K'); | ||
| } | ||
| return arr[arr.length - k]; | ||
| } | ||
|
|
||
| // // create a BST | ||
| // const myBST = new BST(6); | ||
|
|
||
| // myBST.add(2); | ||
| // myBST.add(19); | ||
| // myBST.add(14); | ||
| // myBST.add(8); | ||
| // myBST.add(5); | ||
| // myBST.add(12); | ||
| // myBST.add(33); | ||
| // myBST.add(52); | ||
| // myBST.add(1); | ||
|
|
||
| // // find 3rd max | ||
| // console.log(findKthMax(myBST.root, 3)); | ||
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| module.exports = findKthMax; |
40 changes: 40 additions & 0 deletions
src/_DataStructures_/Trees/BinarySearchTree/find-kth-min/index.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| // eslint-disable-next-line no-unused-vars | ||
| const BST = require('../index'); | ||
|
|
||
| // Inorder traversal returns a sorted array | ||
| function inOrderTraversal(root) { | ||
| if (root === null) return []; | ||
| let arr = []; | ||
| // traverse left | ||
| const left = inOrderTraversal(root.leftChild); | ||
| arr = [...left, root.value]; | ||
| const right = inOrderTraversal(root.rightChild); | ||
| return [...arr, ...right]; | ||
| } | ||
|
|
||
| function findKthMin(rootNode, k) { | ||
| const arr = inOrderTraversal(rootNode); | ||
| if (k <= 0 || k > arr.lenth) { | ||
| throw new Error('Invalid value for K'); | ||
| } | ||
| return arr[k - 1]; | ||
| } | ||
|
|
||
| // // create a BST | ||
| // const myBST = new BST(6); | ||
|
|
||
| // myBST.add(2); | ||
| // myBST.add(19); | ||
| // myBST.add(14); | ||
| // myBST.add(8); | ||
| // myBST.add(5); | ||
| // myBST.add(12); | ||
| // myBST.add(33); | ||
| // myBST.add(52); | ||
| // myBST.add(1); | ||
| // myBST.add(0); | ||
|
|
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| // // find 3rd max | ||
| // console.log(findKthMin(myBST.root, 3)); | ||
|
|
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| module.exports = findKthMin; |
File renamed without changes.
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