Given an array S of n integers, find three integers in S such that the sum is closest to a given number, target.

Given an array of integers, every element appears thrice except for one which occurs once. Find that element which does not appear thrice.

Given an array of integers A, every element appears twice except for one. Find that single one. NOTE: Your algorithm should have a linear

Given an integer A find the Ath number whose binary representation is a palindrome. NOTE: Consider the 1st number whose binary representat

Given a positive integer A, the task is to count the total number of set bits in the binary representation of all the numbers from 1 to A.

Divide two integers without using multiplication, division and mod operator. Return the floor of the result of the division.

Reverse the bits of a 32-bit unsigned integer A. To solve this problem first find the positions of set bits in the original number then

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.

Given a string A representing a roman numeral. Convert A into an integer. A is guaranteed to be within the range from 1 to 3999.

Given an integer A, convert it to a roman numeral, and return a string corresponding to its roman numeral version.