028_爬楼梯

知识点：斐波那契、DP

LeetCode第七十题：https://leetcode-cn.com/problems/climbing-stairs/

语言：GoLang

func climbStairs(n int) int {
    a, b := 1, 1
    for i := 2; i <= n; i++ {
        tmp := b
        b = a + b
        a = tmp
    }
    return b
}