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Nikhil Chandak

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International Olympiad in Informatics

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Competitive Programming

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Indian Computing Olympiad (ICO)

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USA Computing Olympiad

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Himanshu Jaju Mentorship

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Sphere Online Judge (SPOJ)

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NaN.

tutorial

Binary Indexed Trees (aka Fenwick Tree)by Wiki

The motivation for binary indexed trees is similar to that of segment trees. However, note that segment trees are much more flexible than binary indexed trees, and usually its true that any pr...

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Category: Competitive Programming

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Nikhil Chandak3y

I find this (https://www.dropbox.com/s/uwxn0fipojvbfex/segtree.pdf?dl=0) tutorial really intuitive for both Segment Tree and BIT and also the transition from Segment Tree to BIT.

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NaN.

discussion

Minimum Spanning Tree implementation practiceby Udit Sanghi

Here are some MST (Minimum Spanning Tree) questions to practice implementing Prim's or Kruskal's algorithm

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Category: Competitive Programming

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Nikhil Chandak3y

You can try these also CoalScam, MSTQueries, and DAVIDG-SPOJ (not sure about DAVIDG one! )

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4.

discussion

Secret Cow Code (Silver, January Contest: USACO 2017)

Can anyone provide some hints to this problem? Although N <= 10^18 but there is some pattern which I am not able to detect.

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USA Computing Olympiad

http://usaco.org/index.php?page=viewproblem2&cpid=692

Category: USA Computing Olympiad

5.

discussion

Codeforces

How to solve this probem? Can you give some hints. Probably it's a DP problem.

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http://codeforces.com/problemset/problem/474/D

Category: Himanshu Jaju Mentorship

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