Metro Rail Blocks

The city of Dhaka is experiencing the construction of metro rails. Imagine one such metro rail spans from Gulshan to Mirpur. There will be N blocks in total that will serve as the holding structure for the rail lines. The first block is numbered as 1 and the final block is numbered as N. Construction process is fast and each day, one block is being created. But there is a problem.

This is a companion discussion topic for the original entry at