• ErrUchIsDown error

Question related to mission Express Delivery

 

My solution works well and generates right answer, but can't pass Test 2/2 (result "RRRRRRRR") due to ErrUchIsDown. What's the problem?

Created at: July 19, 2016, 3:43 p.m.; Updated at: July 20, 2016, 4:03 a.m.