What is the computational speed of looking something up in a hash table?
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Given a binary matrix (0's and 1's), how many groups of connected 1's are there?
How immediately you can join
What is the best way to store an array?
Difference between Heap and Stack
Convert a string of alphabets to a string which contains the type of the alphabet and it's frequency if the length of the converted string is greater than previous one(ex: 'aa' -> 'aa', 'bbb' -> b3). Ex: 'aabbcccdd' -> 'aabbc3dd'.
how to find square root of integer
Write a function that takes in an array of strings and outputs a dictionary with the first character of each string as the key and the remaining characters as the object.
From which maximum floor can you throw an egg without breaking it?
Easy questions but you need to be very quick .. no time to think.
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