How to Get the Maximum Level Sum of a Binary Tree using Breadth First Search Algorithm?
Given the root of a binary tree, the level of its root is 1, the level of its children is 2, and so on. Return the smallest level X …
Compute the Minimum Costs to Connect the Sticks using Priority Queue or Heap
August 25, 2019
algorithms, c / c++, data structure, java, programming languages, python
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You have some sticks with positive integer lengths. You can connect any two sticks of lengths X and Y into one stick by paying a cost of X + …
Single-Row Keyboard Algorithms to Estimate the Finger Moving Time
There is a special keyboard with all keys in a single row. Given a string keyboard of length 26 indicating the layout of the keyboard (indexed from 0 to …
Bruteforce Algorithm to Find the Next Closet Time Reusing the Current Digits
Given a time represented in the format “HH:MM”, form the next closest time by reusing the current digits. There is no limit on how many times a digit can …
The Overlapping Rectangles using CSS and Javascript
Make three rectangles (Div or Span containers) as shown in the above figure. Clicking on any rectangle should display (using alert is fine) the name of the rectangle. Three …
How to Count the Distinct Pairs using HashMap?
Given an array of integers and a target value, find the number of distinct pairs that sum to the target. The pairs (x,y) and (x’, y’) where x smaller …