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Introduction to Graphs (and how to represent them)by Wiki
I recommend watching the following videos for learning about graphs. These are really well made videos and he covers a lot in these short videos, so if you feel overwhelmed, use the rewind and pause buttons.
Introduction to Graphs
What are graphs? What are different types of graphs (directed and undirected, trees and DAGs, etc)? And examples of using them to model web links, flights between cities, and other things.
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HELP!!! HELP!!! HELP!!!by Bhuwan Chandra
Here's the thing, I messed up my ZCO and is getting 0.
ZIO is my last shot as I am in 12th, and when I sat down to solve ZIO qpaper 2013, I was stumped by the very first question.
So, how do you come to an algorithm for problems in ZIO and what all can be done in 5 days.
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Tricks and Tweaks to code quickly and efficientlyby Jeswin Jacob
This discussion is for expanding your array of maneuvers needed to code quickly and efficiently.
The first and most important thing that I'd like to discuss about is the C++ STL. Learning it would enable you to code up an assortment of algorithms and complicated data structures in a matter of seconds.
You can learn to use the C++ STL from the following amazing sites:
Studytonight : Contains syntax and examples for most of the STL containers and algorithms.
Sanfoundry : Shows how to implement what you've learnt in complete programs
Topcoder(Highly recommended) : This place teaches yo...
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Q&A Session with Sumeet Varma, Codeforces India #1by Keshav Dhandhania
Hey there! I’m Sumeet Varma. I am extremely interested in Algorithms and Data Structures and so I do a lot of competitive programming. I am also a big fan of Counter-Strike, Politics and reading random answers on Quora.
My team (FruitSalad) came 1st in ACM ICPC ‘17 Kharagpur Regionals, 2nd in Kolkata Regionals and 7th in India Finals and we have qualified for World Finals. Also, I have been Red on Codeforces and the highest rated Indian programmer on Codeforces, Hackerrank and Topcoder in the past.
Currently, I am doing an internship at Directi (Bangalore) as a part of my project for final semester at DA-IICT, Gandhinagar.
Ask me anything!
Moderator note: We are very excited to host Sumeet for a Q&A session! He has a max rating of 2515 on Codeforces and 2173 on TopCoder, and you can see the graph going up consistently over the last 2.5 years. It's time to find out more about the person behind ...
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[LEADGAME] Lead Gameby Keshav Dhandhania
Problem statement clarification:
Now I get it, I was misinterpreting question all this time. Actually after finish of each round, lead is not the difference between points of that round. But the lead is difference between the points achieved through all rounds including current round - Lakpa Tashi Bhutia
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Leaf Eaters (ICO online judge)by Jeswin Jacob
For those of you who haven't solved this problem, this is one of the best problems from which you can learn how limitations of memory and time can make an easy problem, difficult to solve!
Just when I obtained the accepted sign after several trials, I was quite disappointed that I got a worst case running time of 1.98 s . So I headed over to Keshav's github repository and when I tried out the solution posted, it gave me a worst case running time of 0.024 s. Wow! Now that's a huge improvement. I really wanted to upgrade my arsenal with the procedure that had been used, but to my dismay I couldn't understand how it actually works. It would be great if someone posted the technique and procedure employed in solving the problem in the link attached above!