Udit Sanghi | CommonLounge

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Udit Sanghi

I am Udit. I am 14. I love maths and programming. I hate school.

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International Olympiad in Informatics

97 replies. 9 discussions. Member

Competitive Programming

29 replies. 3 discussions. Member

Indian Computing Olympiad (ICO)

15 replies. 2 discussions. Member

Game Development

1 reply. Member

Python

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Sphere Online Judge (SPOJ)

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Algorithms and Data Structures

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International Mathematics Olympiad

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U.S. College Admissions for International Students

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Featured Contributions

NaN.

discussion

IOITC Problemsby Ziad Kabakibi

Where can I see IOITC problems and submit them ? :/

thanks in advance

Read more…(14 words)

Category: International Olympiad in Informatics

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Udit SanghiAiming for gold. · 3y

Hello, if you want here are the IOITC 2016 and 2017 problems

2016 - 2016 INOI TST Problems and Test Data.7z

2017 - Simplify your life

Read more… (26 words)

3.

discussion

CCC Elimination Game[Mock CCC'14]

How to solve this problem? Elimination Game

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Elimination Game

To play the Elimination Game, Alice presents Bob with two piles of cards — a pile of N black cards and a pile of M white cards (1 ≤ N , M ≤ 100). Because Bob is a computer scientist, Alice stands before him offering him only two options — play the El

https://wcipeg.com/problem/mockccc14s5

Category: International Olympiad in Informatics

NaN.

discussion

by Stunning Suhail

Hii, I got selected to IOITC this year. I only know topics of INOI like dp and bit of graph theory(since i got to know about ZIO & ZCO this year only and managed to get into INOI through ZIO. Can anybody suggest what should i do to prepare for IOITC

and please soon due to lack of time.

Read more…(68 words)

Category: Indian Computing Olympiad (ICO)

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Udit SanghiAiming for gold. · 3y

IOITC syllabus > IOI syllabus

Read more… (5 words)

Contributed 100%

5.

tutorial

Tries Tutorial

Tries are some kind of rooted trees in which each edge has a character on it. For a bunch of strings, their trie is the smallest rooted tree with a character on each edge and each of these strings can be build by writing down the characters in the path from the root to some node.

This is a nice tutorial for tries - Trie (Keyword Tree) Tutorials & Notes

After reading this read this amazing tutorial here for tries on bits - Tutorial on Trie and example problems

Solve these problems now -

Problem DISUBSTR (classical)

Problem SUBXOR (explained in the blog)

Codeforces (nice)

Read more…(116 words)

Trie (Keyword Tree) Tutorials & Notes

https://hackerearth.com/practice/data-structures/advanced-data-structures/trie-keyword-tree/tutorial/

Tutorial on Trie and example problems

Given a Y, find maximum XOR of Y with all numbers that have been inserted till now. Let's say our subarray with maximum XOR ended at position i. If we have this data structure, we'll insert integers as we go, and with query of 2nd type we'll find the

https://threads-iiith.quora.com/Tutorial-on-Trie-and-example-problems

Problem DISUBSTR

http://spoj.com/problems/DISUBSTR/

Problem ORDERSET

http://spoj.com/problems/ORDERSET/

http://spoj.com/problems/SUBXOR/

http://codeforces.com/problemset/problem/271/D

http://codeforces.com/problemset/problem/455/B

http://codeforces.com/problemset/problem/282/E

http://codeforces.com/problemset/problem/842/D

http://codeforces.com/problemset/problem/665/E

Category: Competitive Programming

6.

discussion

Fake organisations depreciating the value of olympiads

I'm signing because these money making fake organisations(SOF/Silverzone) have completely depreciated the value of real olympiads. Such a step was greatly needed and is finally initiated.

Petition · Organizations bringing down the prestige of "Olympiads" in India · Change.org

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Petition · Organizations bringing down the prestige of "Olympiads" in India · Change.org

https://change.org/p/science-olympiad-foundation-organizations-bringing-down-the-prestige-of-olympiads-in-india

Category: International Olympiad in Informatics

NaN.

discussion

Zco 2018by Rishik Sood

Zco 2018 questions:

1) You have C cakes and N children and k. Each child has a range between Si and Ei inclusive. A child will eat all the cak...

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Category: Competitive Programming

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Udit SanghiPurple on cf. · 4y

I think around 200.

Read more… (4 words)

NaN.

discussion

Zco 2018by Rishik Sood

Zco 2018 questions:

1) You have C cakes and N children and k. Each child has a range between Si and Ei inclusive. A child will eat all the cak...

Read more…(324 words)

Category: Competitive Programming

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Udit SanghiPurple on cf. · 4y

I think it will be around 10-50

Read more… (7 words)

NaN.

discussion

Zco 2018by Rishik Sood

Zco 2018 questions:

1) You have C cakes and N children and k. Each child has a range between Si and Ei inclusive. A child will eat all the cak...

Read more…(324 words)

Category: Competitive Programming

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Udit SanghiPurple on cf. · 4y

Everyone pls update your scores here- Google Sheets

Read more… (8 words)

NaN.

discussion

Chewing (ZCO 2013: India)by Keshav Dhandhania

Zonal Computing Olympiad is round 1 out of 3 (i.e. beginner) for selection into Indian IOI team.

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Category: International Olympiad in Informatics

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Udit SanghiAiming for gold. · 4y

Just use 2-pointer technique instead of binary search

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NaN.

discussion

Tree Man (IOITC 2015, Test 4)by IOITC Bot

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Category: Indian Computing Olympiad (ICO)

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Udit SanghiAiming for gold. · 4y

Any hints?

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