The TL;DR: 1 hour HackerRank challenge, spin off of Merge Intervals, but the input given was a string of the following for an interval x:y, whereby x <= y: x1:y1,x2:y2,...,xn:yn. The input string is not guaranteed to be well-formed--could contain spaces between intervals--and the prerequisites for an "overlapping" interval were for neighboring numbers--that is for two intervalsx1:y1,x2:y2--y1 >= x2 - 1 is considered to be overlapping. For example, 1:2,3:4 would become 1:4.