【力扣】198打家劫舍

      var rob = function(nums) {
        const len = nums.length;
        if(len == 0) return 0;
        const dp = [0,nums[0]];
        for(let i=2;i<=len;i++){
          dp[i] = Math.max(dp[i-1],dp[i-2]+nums[i-1])
        }
        return dp[len]
    };