Category Archives: Uncategorized

One Edit Distance
Leave a commentSeptember 18, 2017 by oneOokay
Given two strings S and T, determine if they are both one edit distance apart. 杀鸡用了牛刀…写了个DP的方法,应该是写成了Edit Distance, 结果TLE了. 这题竟然磕了许久…要理清楚思路吧. One …
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Combination Sum IV
Leave a commentSeptember 16, 2017 by oneOokay
其他的Combination Sum Combination Sum IV Given an integer array with all positive numbers and no duplicates, find the number of …
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TODO
Leave a commentJuly 6, 2017 by oneOokay
Longest Increasing Subsequence Count of Smaller Numbers After Self

Merge sort
Leave a commentJuly 3, 2017 by oneOokay
merge sort 是一个divide and conquer. 记不住什么是merge sort大概是因为merge sort的名字里面少了divide… merge sort:包含两部分,divide和merge. 时间复杂度是:O(nlogn) Divide: recursively divide elements into two parts: 所以这里要传入一个left和right index来标明目前要divide是原array中的哪一段 …
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Remove K Digits
Leave a commentJune 25, 2017 by oneOokay
Given a nonnegative integer num represented as a string, remove k digits from the number so that the new number …
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Find Mode in Binary Search Tree
Leave a commentJune 21, 2017 by oneOokay
Given a binary search tree (BST) with duplicates, find all the mode(s) (the most frequently occurred element) in the given …
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Next Greater Element II
Leave a commentJune 21, 2017 by oneOokay
Given a circular array (the next element of the last element is the first element of the array), print the …
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