Given a string A of parantheses ‘(‘ or ‘)’. The task is to find minimum number of parentheses ‘(‘ or ‘)’ (at any positions) we must add to

Given a string A representing JSON object. Return an array of the string denoting JSON object with proper indentation.

Given a string A consisting of lowercase characters. We need to tell minimum characters to be appended (insertion at end) to make the strin

Given a string A and integer B, remove all consecutive same characters that have length exactly B.

Given a string A consisting of lowercase characters. You have to find the number of substrings in A which starts with vowel and end with co

Find LCM of N numbers, with modulo M, where for this problem statement M is 1e9 + 7.

Given a string A representing JSON object. Return an array of the string denoting JSON object with proper indentation. Rules for proper inde

The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a f

Multiply Strings in C++, without using libraries for this purpose.

Find if the given number is a power of 2 or not. More specifically, find if the given number can be expressed as 2^k where k >= 1.