green marker not working properly
the extension version 1.4 does not work properly for my account on my computer where as it works fine on my computer for one of my friends account. cant figure out why. In my account it only shows the...
View ArticleCLEANUP - Editorial
PROBLEM LINKSPracticeContestDIFFICULTYEASYEXPLANATIONNo real tricks here. An easy approach is to create a boolean array b[] of size n where item b[i] is true if and only if i does not appear in the...
View ArticleAll Submissions page displaying wrong contest code.
I have observed that on the submission page http://www.codechef.com/submissions, the Contest Code column has been displaying wrong code for the problems. Why is it so?
View Articlecannot vote down
i cannot vote down for answer...why is this like that??? when will be able to do so??
View ArticleA green mark for solved practice problems
The practice section of Codechef has lots of problems, specially "easy" ones. So the people who want to practice problems, find it hard to keep track of which problems he/she has solved, and which...
View ArticleHow to get back to CodeChef homepage from CodeChef Forum?
There does not seem to be a button or link. The Codechef logo on the top only links back to the Forum homepage, but how to get back to CodeChef homepage from here?
View ArticleFeature to communicate between members of the community
It would be much easier if there was a feature which enabled us to send private messages to other users just in case. Now if we wanted to ask someone a specific thing, like "their favorite questions on...
View ArticleNAME2 - Editorial
PROBLEM LINKSPracticeContestDIFFICULTYCAKEWALKPREREQUISITESAd-HocPROBLEMGiven two strings, say A and B, find whether A is a sub-sequence of B, or whether B is a sub-sequence of A.A sub-sequence is...
View ArticleNAME1 - Editorial
PROBLEM LINKSPracticeContestDIFFICULTYCAKEWALKPREREQUISITESAd-HocPROBLEMYou are given two strings A and B. You are also given N strings C1, C2, ... CN.Let C = C1 + C2 + ... CN where + is the...
View ArticleHow are strings stored in python?
I want to know whether strings are stored as ASCII values or not . Are strings ended with '\n' Thank you
View ArticleAMBALLS - Editorial
Problem Link:PracticeContestDifficulty:MediumPre-requisites:Dynamic Programming, CombinatoricsProblem:You are given balls of N different colours. There are C[i] balls of colour i. Find how many ways...
View ArticleWhere are some editorials?
I don't understand why the editorials for some problems (probably harder) are missing? first exxample from april challenge - http://ww2.codechef.com/APRIL13/problems/STRQUERY - and for this month I'm...
View Articlemay -13 rankings
when will the rankings be updated, usually it is updated by half hour from the time the contest ends.
View ArticleWhat's wrong in this approach for Field Trip problem?
I got the following formula for finding the probability: (s-k-1 C n-k-1) * (m-1 C k) / (s-1 C n-1) I calculated the above result using Bayes theorem: P(Alice|k) = s-k-1 C n-k-1 / s-k C n-kP(k) = (m-1 C...
View ArticleField Trip May Challenge 2013
May 2013 Challenge field Trip problem.Problem statement hereGetting a runtime error for this code : My code hereThe code runs properly and gives correct output on my computer. But getting a runtime...
View ArticleJUNONGF - Editorial
PROBLEM LINKSPracticeContestDIFFICULTYEASYPREREQUISITESMath, Repeated Squaring, Fermat's Little TheoremPROBLEMYou are given a N dimensional hyper rectangle. You have to fill each cell in the hyper...
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Access Denied for all problems!
I was just surfing to read the problem statement, and Codechef welcomed me with an Access Denied page.Same in the Practice zone
View ArticleYour name is mine
what is wrong with the code? http://ww2.codechef.com/viewsolution/2130155
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