原创 LeetCode (34) Reverse Linked List
題目描述 Reverse a singly linked list. 例如： 1 -> 2 -> 3 -> 4 -> 5 -> 6 ==> 6 -> 5 -> 4 -> 3 -> 2 -> 1 本題比較簡單，使用兩個指針，一個指
2020-06-19 19:37:39
原创 Leetcode (28) Longest Consecutive Sequence
Given an unsorted array of integers, find the length of the longest consecutive elements sequence. For example, Gi
2020-06-19 19:37:39
原创 LeetCode (20) house robber （數組不相鄰元素最大值）
題目描述 You are a professional robber planning to rob houses along a street. Each house has a certain amount of money
2020-06-19 18:37:30
原创 LeetCode (26) LRU Cache
題目描述 Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following ope
2020-02-22 10:17:49
原创 LeetCode (19) Multiply Strings
題目描述 Given two numbers represented as strings, return multiplication of the numbers as a string. Note: The numbers
2020-02-22 10:17:49
原创 LeetCode (29) Fraction to Recurring Decimal
題目描述 Given two integers representing the numerator and denominator of a fraction, return the fraction in string for
2020-02-22 10:17:49
原创 LeetCode (21) Find Minimum in Rotated Sorted Array （with/without duplicates）
題目描述 Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4
2020-02-22 10:17:49
原创 LeetCode (32) Add Two Numbers (字符串)
題目描述 You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order a
2020-02-22 10:17:49
原创 LeetCode (27) Linked List Cycle (判斷cycle存在、尋找cycle入口節點)
判斷cycle存在 Given a linked list, determine if it has a cycle in it. Follow up: Can you solve it without using extra s
2020-02-22 10:17:49
原创 LeetCode(37) Contain Duplicates I II
共有兩道與重複數字相關的題目，contain duplicates I 和 II。 Contain Duplicates I 題目描述 Given an array of integers, find if the array c
2020-02-22 10:17:49
原创 LeetCode (31) Divide two integers (不使用 *, /, mod 求兩個數相除結果)
題目描述 Divide two integers without using multiplication, division and mod operator. If it is overflow, return MAX_INT
2020-02-22 10:17:49
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原创 LeetCode (24) Happy Number
題目描述 Write an algorithm to determine if a number is “happy”. A happy number is a number defined by the following pr
2020-02-22 10:17:49
原创 LeetCode (25) Reverse Nodes in k-Group (鏈表)
題目描述 Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. If the numbe
2020-02-22 10:17:49
原创 OpenCV保存成XML（FileStorage）和CSV（重載
XML文件（使用FileStorage類） 使用OpenCV時不僅要保存影像結果，往往也需要保存中間的矩陣結果，而OpenCV的imwrite函數只支持CV8U類型的數據（使用OpenCV保存其他類型Mat的時候，程序不會報錯，但
2020-02-22 10:17:49
原创 LeetCode (22) Word Search
題目描述 Given a 2D board and a word, find if the word exists in the grid. The word can be constructed from letters of
2020-02-22 10:17:49