杨领well

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全部文章（共268篇）

LeetCode: 202. Happy Number

LeetCode: 202. Happy Number 题目描述 Write an algorithm to determine if a number is “happy”. A happy number is a number defined by the following proces...

2018-09-13

0 546

LeetCode: 201. Bitwise AND of Numbers Range

LeetCode: 201. Bitwise AND of Numbers Range 题目描述 Given a range [m, n] where 0 <= m <= n <= 2147483647, return the bitwise AND of all number...

2018-09-12

0 510

LeetCode: 200. Number of Islands

LeetCode: 200. Number of Islands 题目描述 Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by w...

2018-09-11

0 457

LeetCode: 903. Valid Permutations for DI Sequence

LeetCode: 903. Valid Permutations for DI Sequence 题目描述 We are given S, a length n string of characters from the set {'D', 'I'}. (These letters stand...

2018-09-10

0 501

LeetCode: 902. Numbers At Most N Given Digit Set

LeetCode: 902. Numbers At Most N Given Digit Set 题目描述 We have a sorted set of digits D, a non-empty subset of {'1','2','3','4','5','6','7','8','9'}....

2018-09-09

0 564

LeetCode: 901. Online Stock Span

LeetCode: 901. Online Stock Span 解题思路 Write a class StockSpanner which collects daily price quotes for some stock, and returns the span of that stoc...

2018-09-09

0 586

LeetCode: 900. RLE Iterator

LeetCode: 900. RLE Iterator 题目描述 Write an iterator that iterates through a run-length encoded sequence. The iterator is initialized by RLEIterator(...

2018-09-09

0 538

LeetCode:Weekly Contest 101

LeetCode:Weekly Contest 101 题目描述 1. LeetCode: 900. RLE Iterator 题解签到题。每次调用 next(n) 函数时，判断当前队首的元素的数量和 n 的大小关系。如果队首的元素的数量大于等于 n，则将其数量减少 n ...

2018-09-09

0 502

LeetCode: 198. House Robber

LeetCode: 198. House Robber 解题思路 You are a professional robber planning to rob houses along a street. Each house has a certain amount of money stash...

2018-09-08

0 477

LeetCode: 197. Rising Temperature

LeetCode: 197. Rising Temperature 题目描述 Given a Weather table, write a SQL query to find all dates’ Ids with higher temperature compared to its previ...

2018-09-07

0 493