Algorithms Smallest sum contiguous subarray You are given an array of n integers. The task is to find the sum of the subarray which has the smallest possible sum.

Algorithms Find if there exists a path between two nodes in a directed graph You are given a directed graph and two vertices on it. Your task is to find if there exists a path between the first vertex to the second vertex or not.

Algorithms Minimum number of operations to make XOR of array equal to zero You are given an array of n non-negative integers. Your task is to find the minimum number of operations to make XOR of array equal to zero.

Software Engineering Defining a 2D vector in C++ In this article, we have explored the different ways of defining a 2D vector in C++