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Beautiful Strings solution: Facebook hacker Cup 2013 Qual Round

January 29, 2013 by puzzler Leave a Comment

From 2011 facebook is organizing a Facebook hacker cup every year around feb, visit Facebook hacker cup homepage for more details This question is the first question in the qualification round of 2013 hacker cup. When John was a little kid he … [Continue reading]

Find all non duplicate pairs that sum to S

January 25, 2013 by puzzler Leave a Comment

Find all non duplicate pairs that sum to S. try to do it in O(nlogn). Solution 1: … [Continue reading]

Days of month using 2 dice

January 24, 2013 by puzzler 8 Comments

How can you represent days of month using two 6 sided dice ? You can write one number on each face of the dice from 0 to 9 and you have to represent days from 1 to 31, for example for 1, one dice should show 0 and another should show 1, similarly … [Continue reading]