Stair Steps Stair Steps
RU English

There is a staircase with N steps and two platforms; one at the beginning, the other at the end of the stairs. On each step a number is written (ranging from -100 to 100 with the exception of 0.) Zeros are written on both platforms. You start going up the stairs from the first...

You should be an authorized user in order to see the full description and start solving this mission.