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全部文章 / leetcode （共39篇）

[leetcode][83]Remove Duplicates from Sorted List

Given a sorted linked list, delete all duplicates such that each element appear only once. For example, Given 1->1->2, return 1->2. Given 1...

2020-07-13

0 391

[leetcode][67] Add Binary

Given two binary strings, return their sum (also a binary string). For example, a = "11" b = "1" Return "100". cl...

2020-07-13

0 394

[leetcode][155] Min Stack

Design a stack that supports push, pop, top, and retrieving the minimum element in constant time. push(x) -- Push element x onto stack. pop() -- R...

2020-07-13

0 412

[leetcode][187]Repeated DNA Sequences

All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is sometimes ...

2020-07-13

0 452

[leetcode][108]. Convert Sorted Array to Binary Search Tree

Given an array where elements are sorted in ascending order, convert it to a height balanced BST. # Definition for a binary tree node. # class TreeN...

2020-07-13

0 412

[leetcode][384]. Shuffle an Array

Shuffle a set of numbers without duplicates. Example: // Init an array with set 1, 2, and 3. int[] nums = {1,2,3}; Solution solution = new Solution...

2020-07-13

0 542

[leetcode][18]4Sum

Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array whic...

2020-07-13

0 420

[leetcode][231] Power of Two

Given an integer, write a function to determine if it is a power of two. class Solution(object): def isPowerOfTwo(self, n): "...

2020-07-13

0 411

[leetcode][171] Excel Sheet Column Number

Related to question Excel Sheet Column Title Given a column title as appear in an Excel sheet, return its corresponding column number. For example...

2020-07-13

0 455

[leetcode][350] Intersection of Two Arrays II

Given two arrays, write a function to compute their intersection. Example: Given nums1 = [1, 2, 2, 1], nums2 = [2, 2], return [2, 2]. Note: Eac...

2020-07-13

0 426