LC70 - 爬楼梯

package DP

func climbStairs(n int) int {
    dp := make([]int, n+1)
    dp[0], dp[1] = 1, 1
    for i := 2; i <= n; i++ {
        dp[i] = dp[i-1] + dp[i-2]
    }
    return dp[n]
}