Given a sorted array, write a program to decide if two elements sum up to a third.
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Given a list of integers and a target number, list all pairs that sum up to that number
print out all prime numbers in a given string. abc2134kd31 -> 2, 13, 3, 3
Given a string, remove all the duplicate characters (not necessarily consecutive)
Given a page size and a number, align the number with the nearest page. (Note: This was a phone interview question. The interviewer and I used an online document to share ideas about this problem.
An optimal algorithm to check whether a hand of cards was a full house (in Poker) or not.
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There is an NxM grid containing a robot at (1, 1) and a destination at (N, M). Robot can move only up or right. Some locations can have obstacles. Find the number of unique paths from (1, 1) to (N, M). What is the time complexity of your algorithm?
How to determine if an Array of integers contains 3 numbers that sum to 0
Write a function to return the number of times a character appears in a string. The character can be the empty string.
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