This function asks the user to input the start date and end dates, and then calculates the number of actual working days by deducting the list of user-defined weekend days and holidays.

此功能要求用户输入开始日期和结束日期。然后通过扣除用户定义的周末和假期列表来计算实际的工作日数。

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The winner will be the contestant that is closest on average to the actual number of hospital days for each patient.

FORBES: Kaggle's Predictive Data Contest Aims To Fix Health Care

Zillow analyzed data on actual sales prices compared to asking prices, the number of days listings spent on Zillow and the percentage of homes on the market with a price cut, and ranked the 30 largest metro areas in the country to determine whether buyers or sellers have more negotiating power in a given market.

FORBES: West, Southwest Offer Home Sellers Strong Opportunities; Buyers' Best Bets Are in Midwest, Mid-Atlantic