""" 公鸡5元一只,母鸡3元一只,小鸡1元三只,用100元买一百只鸡,问公鸡、母鸡、小鸡各有多少只? """ for x in range(21): for y in range(34): z = 100 - x - y if z % 3 == 0 and 5 * x + 3 * y + z // 3 == 100: print(x, y, z)