Given a list of unsorted integers, A={a1,a2,…,aN}, can you find the pair of elements that have the smallest absolute difference between them? If there are multiple pairs, find them all.
Segment Tree | Set 1 (Sum of given range) Let us consider the following problem to understand Segment Trees. We have an array arr[0 . . . n-1]. We should be able to 1 Find the sum of elements from index l to r where 0