跳台阶,0台的时候假设为1,1台的时候为1,2台的时候是1台和0台的和,类似···

function jumpFloor(number)
{
    // write code here
    let dp = [1,1];
    for(let i = 2;i<=number;i++){
       dp[i] =  dp[i-2]+dp[i-1];
    }
    return dp[number];
}
module.exports = {
    jumpFloor : jumpFloor
};

费波那奇数列,dp初始化,0时为0,1时为1,2时为1,3时为2,4时为3,5时为5···

{
    // write code here
    let dp0 = 0;
    let dp1 = 1;//或者dp = [0,1]
    for(let i =2;i<=n;i++){
        let tmp = dp1;
        dp1 = dp1 + dp0; //dp[i] = dp[i-1]+dp[i-2]
        dp0 = tmp;
        
    }
    return dp1;//return dp[n];
    
}