Posts

Leetcode 30: Substring with Concatenation of All Words

Posted on May 24, 2018

Question You are given a string, s, and a list of words, words, that are all of the same length. Find all starting indices of substring(s) in s that is a concatenation of each word in words exactly once and without any intervening characters. [Read More]
Tags:
- Leetcode
- SlidingWindow
- Hard
- Review
Leetcode 39: Combination Sum

Posted on May 23, 2018

Question Given a set of candidate numbers (candidates) (without duplicates) and a target number (target), find all unique combinations in candidates where the candidate numbers sums to target. [Read More]
Tags:
- Leetcode
- Backtracking
Leetcode 38: Count and Say

Posted on May 23, 2018

Question The count-and-say sequence is the sequence of integers with the first five terms as following: 1. 1 2. 11 3. 21 4. 1211 5. 111221 1 is read off as “one 1” or 11. [Read More]
Tags:
- Leetcode
Leetcode 36: Valid Sudoku

Posted on May 23, 2018

Question Determine if a 9x9 Sudoku board is valid. Only the filled cells need to be validated according to the following rules: [Read More]
Tags:
- Leetcode
Leetcode 34: Search for a Range

Posted on May 22, 2018

Question Given an array of integers nums sorted in ascending order, find the starting and ending position of a given target value. [Read More]
Tags:
- Leetcode
Leetcode 35: Search Insert Position

Posted on May 22, 2018

Question [Read More]
Tags:
- Leetcode
Leetcode 29: Divide Two Integers

Posted on May 22, 2018

Question Given two integers dividend and divisor, divide two integers without using multiplication, division and mod operator. [Read More]
Tags:
- Leetcode
Leetcode 28: Implement strStr()

Posted on May 22, 2018

Question Implement strStr(). [Read More]
Tags:
- Leetcode
Leetcode 25: Reverse Nodes in k-Group

Posted on May 22, 2018

Question Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. [Read More]
Tags:
- Leetcode
- Hard
- Review
Leetcode 24: Swap Nodes in Pairs

Posted on May 22, 2018

Question Given a linked list, swap every two adjacent nodes and return its head. [Read More]
Tags:
- Leetcode
Leetcode 27: Remove Element

Posted on May 21, 2018

Question Given an array nums and a value val, remove all instances of that value in-place and return the new length. [Read More]
Tags:
- Leetcode
Leetcode 21: Merge k Sorted Lists

Posted on May 21, 2018

Question [Read More]
Tags:
- Leetcode
Leetcode 18: 4Sum

Posted on May 21, 2018

Question Given an array nums of n integers and an integer target, are there elements a, b, c, and d in nums such that a + b + c + d = target? Find all unique quadruplets in the array which gives the sum of target. [Read More]
Tags:
- Leetcode
Leetcode 17: Letter Combinations of a Phone Number

Posted on May 21, 2018

Question Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. [Read More]
Tags:
- Leetcode
Leetcode 16: 3Sum Closest

Posted on May 21, 2018

Question Given an array nums of n integers and an integer target, find three integers in nums such that the sum is closest to target. Return the sum of the three integers. You may assume that each input would have exactly one solution. [Read More]
Tags:
- Leetcode

Leetcode 30: Substring with Concatenation of All Words

Leetcode 39: Combination Sum

Leetcode 38: Count and Say

Leetcode 36: Valid Sudoku

Leetcode 34: Search for a Range

Leetcode 35: Search Insert Position

Leetcode 29: Divide Two Integers

Leetcode 28: Implement strStr()

Leetcode 25: Reverse Nodes in k-Group

Leetcode 24: Swap Nodes in Pairs

Leetcode 27: Remove Element

Leetcode 21: Merge k Sorted Lists

Leetcode 18: 4Sum

Leetcode 17: Letter Combinations of a Phone Number

Leetcode 16: 3Sum Closest