其实,Insertion Sort中元素移动的次数和这个序列中逆序数的和是相等的。因为,在把元素a[i]插入数组的过程中,已经排好序的部分数组中比它大的元素都要后移。 所以我们的问题就简化为怎样快速的求出一个序列的逆序数。网上的方法很多:Binary Search Tree(当树为单支二叉树的时候算法复杂度退化到O(N2),红黑树,归...
Data Structures Trees: Is This a Binary Search Tree? TreesIsThisABinarySearchTree.java Data Structures Heaps: Find the Running Median HeapsFindTheRunningMedian.java Data Structures Tries: Contacts TriesContacts.java Algorithms Sorting: Bubble Sort SortingBubbleSort.java Algorithms Sorting: Comparator...
Trees Binary Search Tree : Insertion Easy 20 Solution.java Trees Tree: Huffman Decoding Medium 20 Solution.java Trees Binary Search Tree : Lowest Common Ancestor Easy 30 Solution.java Trees Swap Nodes [Algo] Medium 40 Solution.java Trees Is This a Binary Search Tree? Medium 30 Solution.cpp Ba...
Trees Tree: Height of a Binary Tree 10 Solution.java Trees Tree: Level Order Traversal 20 Solution.java Trees Tree: Huffman Decoding 20 Solution.java Trees Binary Search Tree: Insertion 20 Solution.java Trees Binary Search Tree: Lowest Common Ancestor 30 Solution.java Trees Is This a Binary Se...
The Story of a Tree Java Medium 50 Breadth First Search: Shortest Reach Java Medium 55 The Value of Friendship Java Hard 55 Clique Java Medium 60 Dijkstra: Shortest Reach 2 Java Hard 60 Prim's (MST) : Special Subtree Java Medium 60 Roads in Hackerland Java Medium 60 Toll Cost...
Search a 2D Matrix 🟠Medium Array, Binary Search, Matrix Problem Set / Algorithms LeetCode 94. Binary Tree Inorder Traversal 🟠Medium Hash Table, Stack, Tree Problem Set / Algorithms LeetCode 98. Validate Binary Search Tree 🟠Medium Tree, Depth-first Search Problem Set / Algorithms Leet...
The Story of a Tree Java Medium 50 Breadth First Search: Shortest Reach Java Medium 55 The Value of Friendship Java Hard 55 Clique Java Medium 60 Dijkstra: Shortest Reach 2 Java Hard 60 Prim's (MST) : Special Subtree Java Medium 60 Roads in Hackerland Java Medium 60 Toll Cost...
Data Structures Trees: Is This a Binary Search Tree? TreesIsThisABinarySearchTree.java Data Structures Heaps: Find the Running Median HeapsFindTheRunningMedian.java Data Structures Tries: Contacts TriesContacts.java Algorithms Sorting: Bubble Sort SortingBubbleSort.java Algorithms Sorting: Comparator...
Data Structures Trees: Is This a Binary Search Tree? TreesIsThisABinarySearchTree.java Data Structures Heaps: Find the Running Median HeapsFindTheRunningMedian.java Data Structures Tries: Contacts TriesContacts.java Algorithms Sorting: Bubble Sort SortingBubbleSort.java Algorithms Sorting: Comparator...
Data Structures Trees: Is This a Binary Search Tree? TreesIsThisABinarySearchTree.java Data Structures Heaps: Find the Running Median HeapsFindTheRunningMedian.java Data Structures Tries: Contacts TriesContacts.java Algorithms Sorting: Bubble Sort SortingBubbleSort.java Algorithms Sorting: Comparator...