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 …
Category: algorithms
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 …
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 …