questions

balancedpara:to check if paranthesis is balanced

stringunque:to check is every character in a string is unqiue (O(n))

revstring:to reverse a string

twoSum1:to find two numbers that add upto a target number.given a array and a target sum (both of int)

twoSum2:twoSum1 but input array is sorted

longestsubstring:Given a string s, find the length of the longest substring without repeating characters.

anagram:check is two strings are anagrams are not