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Added solution in Python for Min CostClimbingStai

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	`1`	`+class Solution:`
	`2`	`+ def minCostClimbingStairs(self, cost: List[int]) -> int:`
	`3`	`+ prev2, prev1 = 0, 0`
	`4`	`+ for i in range(2, len(cost) + 1):`
	`5`	`+ curr = min(prev2 + cost[i - 2], prev1 + cost[i - 1])`
	`6`	`+ prev2, prev1 = prev1, curr`
	`7`	`+ return prev1`

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