If $800 from 2017 dependent care FSA funds is left over and used in the 2018 grace period, does that reduce the allowed 2018 FSA contributions to $4200 vs the full $5000?

i.e do unused dependent care FSA funds from one year that are used in the plan's 2.5 month grace period early in the following year count against the following year's $5,000 IRS allowable max dependent care FSA contribution?