Posts

Leetcode 377: Combination Sum IV

Posted on August 21, 2018

Question Given an integer array with all positive numbers and no duplicates, find the number of possible combinations that add up to a positive integer target. [Read More]
Tags:
- Leetcode
Leetcode 376: Wiggle Subsequence

Posted on August 21, 2018

Question A sequence of numbers is called a wiggle sequence if the differences between successive numbers strictly alternate between positive and negative. The first difference (if one exists) may be either positive or negative. A sequence with fewer than two elements is trivially a wiggle sequence. [Read More]
Tags:
- Leetcode
Leetcode 375: Guess Number Higher or Lower II

Posted on August 21, 2018

Question We are playing the Guess Game. The game is as follows: [Read More]
Tags:
- Leetcode
- Review
Leetcode 374: Guess Number Higher or Lower

Posted on August 21, 2018

Question We are playing the Guess Game. The game is as follows: [Read More]
Tags:
- Leetcode
Leetcode 373: Find K Pairs with Smallest Sums

Posted on August 20, 2018

Question You are given two integer arrays nums1 and nums2 sorted in ascending order and an integer k. [Read More]
Tags:
- Leetcode
- Review
Leetcode 372: Super Pow

Posted on August 20, 2018

Question Your task is to calculate a^b mod 1337 where a is a positive integer and b is an extremely large positive integer given in the form of an array. [Read More]
Tags:
- Leetcode
- Review
Leetcode 371: Sum of Two Integers

Posted on August 18, 2018

Question Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -. [Read More]
Leetcode 370: Range Addition

Posted on August 16, 2018

Question Assume you have an array of length n initialized with all 0’s and are given k update operations. [Read More]
Tags:
- Leetcode
- Review
Leetcode 369: Plus One Linked List

Posted on August 16, 2018

Question Given a non-negative integer represented as non-empty a singly linked list of digits, plus one to the integer. [Read More]
Tags:
- Leetcode
Leetcode 97: Interleaving String

Posted on August 16, 2018

Question Given s1, s2, s3, find whether s3 is formed by the interleaving of s1 and s2. [Read More]
Tags:
- Leetcode
- Hard
- DP
- Review
Leetcode 87: Scramble String

Posted on August 16, 2018

Question Given a string s1, we may represent it as a binary tree by partitioning it to two non-empty substrings recursively. [Read More]
Tags:
- Leetcode
- Hard
Leetcode 85: Maximal Rectangle

Posted on August 16, 2018

Question Given a 2D binary matrix filled with 0’s and 1’s, find the largest rectangle containing only 1’s and return its area. [Read More]
Tags:
- Leetcode
- Review
- Hard
Leetcode 84: Largest Rectangle in Histogram

Posted on August 15, 2018

Given n non-negative integers representing the histogram’s bar height where the width of each bar is 1, find the area of largest rectangle in the histogram. [Read More]
Tags:
- Leetcode
- Review
- Hard
Leetcode 76: Minimum Window Substring

Posted on August 15, 2018

Question Given a string S and a string T, find the minimum window in S which will contain all the characters in T in complexity O(n). [Read More]
Tags:
- Leetcode
- Review
- SlidingWindow
- Hard
Leetcode 72: Edit Distance

Posted on August 15, 2018

Question Given two words word1 and word2, find the minimum number of operations required to convert word1 to word2. [Read More]
Tags:
- Leetcode
- Review
- DP
- Hard

Leetcode 377: Combination Sum IV

Leetcode 376: Wiggle Subsequence

Leetcode 375: Guess Number Higher or Lower II

Leetcode 374: Guess Number Higher or Lower

Leetcode 373: Find K Pairs with Smallest Sums

Leetcode 372: Super Pow

Leetcode 371: Sum of Two Integers

Leetcode 370: Range Addition

Leetcode 369: Plus One Linked List

Leetcode 97: Interleaving String

Leetcode 87: Scramble String

Leetcode 85: Maximal Rectangle

Leetcode 84: Largest Rectangle in Histogram

Leetcode 76: Minimum Window Substring

Leetcode 72: Edit Distance