3 votes 3 votes https://www.youtube.com/watch?v=yVYmarYFOQs&t=222s can anyone tell me here at 7:49 it should be 2^logn not 2^logn - 1 ??? sumit goyal 1 asked Jul 29, 2017 sumit goyal 1 145 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.