10 people are seating on chairs around a circular table. These chairs are marked in a clockwise manner. There is a ball on the man’s hand who is seated on 0 marked chair, and the ball will be passed from one man to another in clockwise manner. In first step, the ball goes to 1 marked chair with 1^1 turn. In second step, from there, the ball goes to 5 marked chair with 2^2 turns. In third step, the ball goes to 2 marked chair by 3^3 turns from 5 marked chair. By this means, in which(marked) chair the ball will be in 2018th step?
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Mathematica
s = 0; For[i = 1, i <= 2018, i++, s = Mod[s + i^i, 10]]; s
answer is 5