This puzzle has a couple of problems: The problem description claims there are 100 rows, but the data only has 99 rows. The example solution shows an "isosceles" triangle, but the data set represents a "right" triangle and the given example solution is impossible with a right triangle (because the left border is a constraint). In order to properly solve the puzzle, one much make assumptions that may turn out to be untrue.

Resolving such ambiguities and unspecified detail is something we deal with every day; however, it's less than helpful so early in the process. As others have mentioned, hiring is a two way street.