Climbing Stairs Problem (JS)

The solution for this is noted below

Solution

var climbStairs = function (n) {
	if (n == 1 || n == 0) return 1 // our base cases

	let first = 1
	let second = 2

	for (let i = 3; i <= n; i++) {
		let third = first + second
		first = second
		second = third
	}
	return second
}

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