1) Given a string of parantheses, check if the string is valid. ex: [[]] is valid, ][][ is not valid. How would you solve if the parantheses could be of different types like {,[,(
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CODING (weight: 50%) The string "PAYPAL IS HIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) P A H N A P L S I I G Y I R And then read line by line: PAHNAPLSIIGYIR Write the code that will take a string and make this conversion given a number of rows: String convert(String text, int nRows); convert("paypalishiring", 3) should return "pahnaplsiigyir"
Given a string "AABCCC" make a new string "2A1B3C"
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Print a N x M matrix in diagonal from the upper left to lower right. However, with the following caveat. It's easy to just show the input and expect output. matrix: a b c d e f g h i j k output: aej bfk cg di h
Write a program for input any number the pattern output will as below
iOS developers have a "dispatch_after(when, queue, block)" Grand Central Dispatch (GCD) function they can utilize but once it's set up, these calls can not be easily cancelled. Describe how you might implement a more convenient version of this named "cancellable_dispatch_after"
Given many points, find k points that are closest to the origin.
Was given a homework question(2days): Program using a language of your choice the following assignment, given a file of sorted strings (one string per line, example file was given) sorted according to some unknown alphabet, recover the order of characters of this alphabet.
You have the file with word at a single line. #input sample file abactor abaculus abacus Abadite . . Zyrenian #Output ******************a **********b ************************c a) you have to count the character and create a histogram in alphabetical order. b) now you have to produce a histogram with max 80 character in line in reference to max count c) now same out based histrogram based on the character count
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