Geek wants to climb from the 0th stair to the (n-1)th stair. At a time the Geek can climb either one or two steps. A height[N] array is also given. Whenever the geek jumps from stair i to stair j, the energy consumed in the jump is abs(height[i]- height[j]), where abs() means the absolute difference. return the minimum energy that can be used by the Geek to jump from stair 0 to stair N-1.

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