Climbing Stairs
You are standing at the bottom of a staircase with `n` steps. On each move, you may climb either 1 step or 2 steps. Count how many different move sequences land exactly on the top.
You are standing at the bottom of a staircase with `n` steps. On each move, you may climb either 1 step or 2 steps. Count how many different move sequences land exactly on the top.