Given a number, count the number of set bits.

Implement atoi to convert a string to an integer.

Validate if a given string is numeric or not. Code in C++....

A robot is located at the top-left corner of an A x B grid. The robot can only move either down or right at any point in time. The robot is

Give a N*N square matrix, return an array of its anti-diagonals. Look at the example for more details.

Given an array of integers, sort the array into a wave like array and return it, In other words, arrange the elements into a sequence such t