Hash Map data structure is taken which works with the key-value pair. Loop the string, character by character, and verify if that character of the string exists in the hash map or not. If the result is true, the counter for the character in the hash map is increased or else then put...
so that's what I cover here. For a complete CS self-taught program, the resources for my study plan have been included in Kamran Ahmed's Computer Science Roadmap:https://roadmap.sh/computer-science
import java.util.Scanner; import java.io.File; import java.util.HashMap; import java.util.ArrayList; import java.util.Random; import java.io.*;/** * Class that contains helper methods for the Review Lab **/ public class Review { private ...
Kiedy rozpocząłem ten projekt, nie rozpoznawałem stosu (stack) od sterty (heap), nie znałem notacji dużego O (złożoności obliczeniowej algorytmów, asymptotycznego tempa wzrostu), nie wiedziałem nic o drzewach ani tego, jak przejść przez graf. Gdybym musia...
Do not jump straight into coding, take a few mins to understand the problem and ask any clarifying questions (but not too long!). Describe your solution to your interviewer and get their thoughts on your solution. Think about your algorithm(s) including the complexity and runtime. Ask the ...
For me, the approach towards solving questions taught by the team on the Youtube channel helped me convey my thoughts clearly to the interviewer while solving the questions. Happy to share that I have gotten an offer from Amazon as a Data Analyst, and I am thankful to the StrataScratch ...
import java.util.HashMap; public class FinalCountWords { public static void main(String[] args) { // TODO Auto-generated method stub String str = "This this is is done by Saket Saket"; String[] split = str.split(" "); HashMap<String,Integer> map = new HashMap<String,Integer>();...
(mostly). I remember the interviewer asking me a question about substring matching, which turned out to be a piece of cake with a custom string hashing function and a hashmap. I was done within half an hour and went to sleep imagining if Google internship would be as fun as they say ...
It costs $25 on iOS but is free on other platforms. My flashcard database in Anki format: https://ankiweb.net/shared/info/25173560 (thanks @xiewenya). 3. Start doing coding interview questions while you're learning data structures and algorithms You need to apply what you're learning to...
And many data structures used: arrays, hashmaps, sets, trees, stacks... And also, time and space complexity analysis is provided for every problem! Problems covered: 1- Find pair that sums up to k 2- First repeating character 3- Remove duplicates ...