Schwifty - 博客园

2019年11月16日

摘要： Given the following details of a matrix with n columns and 2 rows : The matrix is a binary matrix, which means each element in the matrix can be 0 or 阅读全文

posted @ 2019-11-16 09:04 Schwifty 阅读(178) 评论(0) 推荐(0)

1252. Cells with Odd Values in a Matrix

摘要： Given n and m which are the dimensions of a matrix initialized by zeros and given an array indices where indices[i] = [ri, ci]. For each pair of [ri, 阅读全文

posted @ 2019-11-16 05:51 Schwifty 阅读(221) 评论(0) 推荐(0)

1250. Check If It Is a Good Array

摘要： Given an array nums of positive integers. Your task is to select some subset of nums, multiply each element by an integer and add all these numbers. T 阅读全文

posted @ 2019-11-16 05:33 Schwifty 阅读(243) 评论(0) 推荐(0)

2019年11月15日

380. Insert Delete GetRandom O(1)

摘要： Design a data structure that supports all following operations in average O(1) time. insert(val): Inserts an item val to the set if not already presen 阅读全文

posted @ 2019-11-15 12:24 Schwifty 阅读(132) 评论(0) 推荐(0)

378. Kth Smallest Element in a Sorted Matrix

摘要： Given a n x n matrix where each of the rows and columns are sorted in ascending order, find the kth smallest element in the matrix. Note that it is th 阅读全文

posted @ 2019-11-15 11:03 Schwifty 阅读(85) 评论(0) 推荐(0)

341. Flatten Nested List Iterator

摘要： Given a nested list of integers, implement an iterator to flatten it. Each element is either an integer, or a list -- whose elements may also be integ 阅读全文

posted @ 2019-11-15 10:18 Schwifty 阅读(147) 评论(0) 推荐(0)

2019年11月14日

387. First Unique Character in a String

摘要： Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1. Examples: s = "leetcode" return 0. 阅读全文

posted @ 2019-11-14 14:12 Schwifty 阅读(115) 评论(0) 推荐(0)

2019年11月13日

454. 4Sum II

摘要： Given four lists A, B, C, D of integer values, compute how many tuples (i, j, k, l) there are such that A[i] + B[j] + C[k] + D[l] is zero. To make pro 阅读全文

posted @ 2019-11-13 12:00 Schwifty 阅读(96) 评论(0) 推荐(0)

2019年11月9日

345. Reverse Vowels of a String

摘要： Write a function that takes a string as input and reverse only the vowels of a string. Example 1: Input: "hello" Output: "holle" Example 2: Input: "le 阅读全文

posted @ 2019-11-09 10:22 Schwifty 阅读(133) 评论(0) 推荐(0)

371. Sum of Two Integers

摘要： Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -. Example 1: Input: a = 1, b = 2 Output: 3 Example 2: In 阅读全文

posted @ 2019-11-09 10:02 Schwifty 阅读(108) 评论(0) 推荐(0)

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