8个数字3个一组有多少组合公式

简介：There was nothing to do today, so the father took his daughter to the city gate to watch the excitement, casually helped the merchants entering the city with their carts, and picked up the horse manure in front of the city gate to exchange for one or two cornbread - Shuntian Prefecture has regulations that refugees are not allowed. Those who enter the city are not allowed to beg at the city gate, so the refugees can only make ends meet near the city gate in their free time.