Reverse words in a sentence (a char[]) without using additional space. eg. "Hello there children" -> "children there Hello"
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Three of my 150 friends have phone numbers ending in a permutation of the digits 0, 1, 4, and 9. Is this surprising?
Determine if a string is valid based on placement of parenthesis. i.e. "123(13(44))" is valid but ")234(12)(" is not.
Given an array of strings with commit ids, and a predicate isBuggy that returns if a single commit is buggy, write a program that finds the first buggy commit. - When a commit is buggy, we assume that all its children are buggy. - When a commit is not buggy, we assume that all its ancestors are not buggy. After solving it, I had to describe its time complexity and spatial complexity and how would I choose the test cases.
How do you swap 2 variable without using temporaries. (My version is given 2 register and 1 ALU, how do you swap the value of the 2 register without using external register or temporaries)
Given a matrix with 1's and 0's, find the number of groups of 1's. A group is defined by horiz/vertically adjacent 1's.
Use basic arithmetic operations (+-*/) to implement sqrt function.
Given a string write a function which prints all the subsets of the string. Now make the function to return only unique solutions. For example if they give you "abc" you print out a ab abc ac b bc c Now for the unique solution constraint, if they give you "aba" the output should be: a ab aba b
How do you see 5 years from now?
Given N credits cards, determine if more than half of them belong to the same person/owner. All you have is an array of the credit card numbers, and an api call like isSamePerson(num1, num2).
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