原创 Leetcode之Angle Between Hands of a Clock
題目： Given two numbers, hour and minutes. Return the smaller angle (in sexagesimal units) formed between the hour and th
2020-06-23 06:58:31
原创 Leetcode之Wiggle Subsequence
題目： A sequence of numbers is called a wiggle sequence if the differences between successive numbers strictly alternate
2020-06-23 06:58:31
原创 Leetcode之Deepest Leaves Sum
題目： Given a binary tree, return the sum of values of its deepest leaves. Example 1: Input: root = [1,2,3,4,5,null,6,7
2020-06-23 06:58:31
原创 Leetcode之Count Numbers with Unique Digits
題目： Given a non-negative integer n, count all numbers with unique digits, x, where 0 ≤ x < 10n. Example: Input: 2 Outp
2020-06-23 06:58:31
原创 Leetcode之Russian Doll Envelopes
題目： You have a number of envelopes with widths and heights given as a pair of integers (w, h). One envelope can fit int
2020-06-23 06:58:31
原创 Leetcode之Knight Probability in Chessboard
題目： On an NxN chessboard, a knight starts at the r-th row and c-th column and attempts to make exactly K moves. The row
2020-06-23 06:58:31
原创 Leetcode之 Path Sum III
題目： You are given a binary tree in which each node contains an integer value. Find the number of paths that sum to a gi
2020-06-23 06:58:31
原创 Leetcode之 Binary Search Tree to Greater Sum Tree
題目： Given the root of a binary search tree with distinct values, modify it so that every node has a new value equal to
2020-06-23 06:58:31
原创 Leetcode之Split Array into Fibonacci Sequence
題目： Given a string S of digits, such as S = "123456579", we can split it into a Fibonacci-like sequence [123, 456, 579]
2020-06-23 06:58:31
原创 Leetcode之Word Pattern
題目： Given a pattern and a string str, find if str follows the same pattern. Here follow means a full match, such that t
2020-06-23 06:58:31
原创 Leetcode之Concatenated Words
題目： 代碼： 方法一——： class Solution { public: vector<string> findAllConcatenatedWordsInADict(vector<string>& words) {
2020-06-03 09:54:23
原创 Leetcode之Rotate Function
題目： Given an array of integers A and let n to be its length. Assume Bk to be an array obtained by rotating the array A
2020-06-03 09:54:23
原创 Leetcode之Single Element in a Sorted Array
題目： You are given a sorted array consisting of only integers where every element appears exactly twice, except for one
2020-05-18 19:02:25
原创 Leetcode之Max Sum of Rectangle No Larger Than K
題目： Given a non-empty 2D matrix matrix and an integer k, find the max sum of a rectangle in the matrix such that its su
2020-05-05 04:33:04
原创 Leetcode之 Can I Win
題目： In the "100 game," two players take turns adding, to a running total, any integer from 1..10. The player who first
2020-04-30 12:33:24