9个数字有多少种组合不重复

简介：Wang Zhang smiled bitterly. Ordinary people didn't know it, but he, a sixth-rank magistrate, knew that the imperial court was in financial distress and lacked food and grass. The continuous wars had almost exhausted all the food reserves in Huguang, South Zhili, even if the prince had an order. , but when the treasury is empty, where will the food be adjusted?