Posts

Leetcode 368: Largest Divisible Subset

Posted on August 13, 2018

Question Given a set of distinct positive integers, find the largest subset such that every pair (Si, Sj) of elements in this subset satisfies: Si % Sj = 0 or Sj % Si = 0. [Read More]

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Leetcode 367: Valid Perfect Square

Posted on August 13, 2018

Question Given a positive integer num, write a function which returns True if num is a perfect square else False. [Read More]

Leetcode 366: Find Leaves of Binary Tree

Posted on August 13, 2018

Question Given a binary tree, collect a tree’s nodes as if you were doing this: Collect and remove all leaves, repeat until the tree is empty. [Read More]

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Leetcode

Leetcode 365: Water and Jug Problem

Posted on August 13, 2018

Question You are given two jugs with capacities x and y litres. There is an infinite amount of water supply available. You need to determine whether it is possible to measure exactly z litres using these two jugs. [Read More]

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Leetcode 364: Nested List Weight Sum II

Posted on August 13, 2018

Question Given a nested list of integers, return the sum of all integers in the list weighted by their depth. [Read More]

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Leetcode

Numpy Cheet Sheet

Posted on August 12, 2018

NumPy is the library that gives Python its ability to work with data at speed. Originally, launched in 1995 as ‘Numeric,’ NumPy is the foundation on which many important Python data science libraries are built, including Pandas, SciPy and scikit-learn. [Read More]

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Finance

Pandas Cheet Sheet

Posted on August 12, 2018

The Pandas library is one of the most preferred tools for data scientists to do data manipulation and analysis, next to matplotlib for data visualization and NumPy, the fundamental library for scientific computing in Python on which Pandas was built. [Read More]

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Finance

Leetcode 362: Design Hit Counter

Posted on August 12, 2018

Question Design a hit counter which counts the number of hits received in the past 5 minutes. [Read More]

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Leetcode

Leetcode 361: Bomb Enemy

Posted on August 12, 2018

Question Given a 2D grid, each cell is either a wall 'W', an enemy 'E' or empty '0' (the number zero), return the maximum enemies you can kill using one bomb. [Read More]

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Leetcode

Leetcode 360: Sort Transformed Array

Posted on August 12, 2018

Question Given a sorted array of integers nums and integer values a, b and c. Apply a quadratic function of the form f(x) = ax2 + bx + c to each element x in the array. [Read More]

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Leetcode

Leetcode 357: Count Numbers with Unique Digits

Posted on August 12, 2018

Question Given a non-negative integer n, count all numbers with unique digits, x, where 0 ≤ x < 10n. [Read More]

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Leetcode

Leetcode 356: Line Reflection

Posted on August 12, 2018

Question Given n points on a 2D plane, find if there is such a line parallel to y-axis that reflect the given points. [Read More]

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Leetcode 355: Design Twitter

Posted on August 12, 2018

Question Design a simplified version of Twitter where users can post tweets, follow/unfollow another user and is able to see the 10 most recent tweets in the user’s news feed. Your design should support the following methods: [Read More]

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Leetcode

Leetcode 353: Design Snake Game

Posted on August 12, 2018

Question Design a Snake game that is played on a device with screen size = width x height. Play the game online if you are not familiar with the game. [Read More]

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Leetcode

Leetcode 351: Android Unlock Patterns

Posted on August 12, 2018

Question Given an Android 3x3 key lock screen and two integers m and n, where 1 ≤ m ≤ n ≤ 9, count the total number of unlock patterns of the Android lock screen, which consist of minimum of m keys and maximum n keys. [Read More]

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