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SUBGRAPH - Editorial
PROBLEM LINK:PracticeContestAuthor:Kanstantsin SokalTester:Jingbo ShangEditorialist:Lalit KunduDIFFICULTY:Medium-HardPREREQUISITES:DP on trees, graphsPROBLEM:You are given an undirected graph $G$ of...
View ArticleSuggested Changes
With the increasing amount of users being participating in Codechef contests and the problems the site is going through, here I some changes which I would like to suggest-1)First of all, There has been...
View ArticleCHANGES IN CODECHEF SITE
Finally, the Old type of Codechef site is back. The colour on the question show that we have either solved the question fully, partially or whether it is wrong. The best thing is that the Announcements...
View ArticleTWOSTR - Editorial
PROBLEM LINK:PracticeContestAuthor:Tasnim Imran SunnyTester:Istvan NagyEditorialist:Lalit KunduDIFFICULTY:CakewalkPREREQUISITES:basic programming, stringsPROBLEM:Chef wants to implement wildcard...
View ArticleXORNUBER - Editorial
PROBLEM LINK:PracticeContestAuthor:Tasnim Imran SunnyTester:Istvan NagyEditorialist:Lalit KunduDIFFICULTY:SimplePREREQUISITES:bitwise operators, basic mathsPROBLEM:Given an integer $N$, Chef wants to...
View ArticleSEQLCS - Editorial
PROBLEM LINK:PracticeContestAuthor:Tasnim Imran SunnyTester:Istvan NagyEditorialist:Lalit KunduDIFFICULTY:MediumPREREQUISITES:dynamic programming, bitmaskingPROBLEM:Given a sequence $A$ of $N$ integers...
View ArticleDUALPAL - Editorial
PROBLEM LINK:PracticeContestAuthor:Tasnim Imran SunnyTester:Istvan NagyEditorialist:Lalit KunduDIFFICULTY:HardPREREQUISITES:maths, backtrackingPROBLEM:A number is called a Dual Palindrome if it's...
View ArticleCARDLINE - Editorial
PROBLEM LINK:PracticeContestAuthor:Tasnim Imran SunnyTester:Istvan NagyEditorialist:Lalit KunduDIFFICULTY:Medium-HardPREREQUISITES:dynamic programming, graphs, greedyPROBLEM:There are $N$ cards placed...
View ArticleCOPS - Editorial
PROBLEM LINK:PracticeContestAuthor:Devendra AgarwalTester:Surya KiranEditorialist:Amit PandeyDIFFICULTY:CakewalkPREREQUISITES:NonePROBLEM:There are 100 houses in a lane, numbered from 1 to 100. N cops...
View ArticleSEQTOWER - Editorial
PROBLEM LINK:PracticeContestAuthor:Devendra AgarwalTester:Surya KiranEditorialist:Amit PandeyDIFFICULTY:Medium-HardProblem:You are given an array A consisting of prime numbers greater than 4. Fun(S) =...
View ArticleCOMB4SUM - Editorial
PROBLEM LINK:PracticeContestAuthor:Devendra AgarwalTester:Surya KiranEditorialist:Amit PandeyDIFFICULTY:Easy-MediumPREREQUISITES:NonePROBLEM:Special Sum of 4 numbers (a, b, c, d) is defined...
View ArticleUTMOPR - Editorial
PROBLEM LINK:PracticeContestAuthor: Ankit Srivastava and Uttam Kanodia Tester: Roman Rubanenko Editorialist: Amit PandeyDIFFICULTY:CakewalkPREREQUISITES:Basic programmingPROBLEM:Given an array of $n$...
View ArticleANKPAREN - Editorial
PROBLEM LINK:PracticeContestAuthor: Ankit Srivastava and Uttam Kanodia Tester: Roman Rubanenko Editorialist: Amit PandeyDIFFICULTY:Easy-MediumPREREQUISITES:Basic programmingPROBLEM:Given a string...
View ArticleANKGAME - Editorial
PROBLEM LINK:PracticeContestAuthor: Ankit Srivastava and Uttam Kanodia Tester: Roman Rubanenko Editorialist: Amit PandeyDIFFICULTY:Easy-Medium.PREREQUISITES:Game theory and Combinatorics.PROBLEM:A game...
View ArticleANKMARKS - Editorials
PROBLEM LINK:PracticeContestAuthor: Ankit Srivastava and Uttam Kanodia Tester: Roman Rubanenko Editorialist: Amit PandeyDIFFICULTY:MediumPREREQUISITES:Matrix ExponentiationPROBLEM:There are $N$...
View ArticleANKNIM2 - Editorials
PROBLEM LINK:PracticeContestAuthor: Ankit Srivastava and Uttam Kanodia Tester: Roman Rubanenko Editorialist: Amit PandeyDIFFICULTY:MediumPREREQUISITES:Fast Fourier Transform. PROBLEM:Given an array of...
View ArticleCANDLE - Editorial
PROBLEM LINKSPracticeContestDIFFICULTYEASYEXPLANATIONThe answer will always be either a repdigit (a number composed of repeated instances of the same digit) or a power of 10. We find the smallest power...
View ArticleTANSWTCH - Editorial
PROBLEM LINK:PracticeContestAuthor:Ayush JaggiTester:Anurag AnandEditorialist:Anurag AnandDIFFICULTY:CAKEWALK.PREREQUISITES:Ad HocPROBLEM:Given the configuration of a sequence of switches as a string,...
View ArticleCheating In SOPC2.0
I was trying to post this from the day SOPC2.0was conducted but I was short of Karma points. It was very ambiguous that all the solution getting highest score in...
View ArticleTLG - Editorial
PROBLEM LINK:PracticeAuthor:ADMINEditorialist:SUSHANT AGARWALDIFFICULTY:EASYPREREQUISITES:Basic looping,ArraysPROBLEM:At the end of each round the leader and her current lead are calculated. Once all...
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