You went shopping to buy cakes and donuts with X yen (the currency of Japan).  First, you bought one cake for A yen at a cake shop. Then, you bought as many donuts as possible for B yen each, at a donut shop.  How much do you have left after shopping?
a = int(input())
b = int(input())
c = int(input())
print((a-b)//c)
a,b,c = int(input()), int(input()), int(input())
print((a-b)%c)