# 1010 一元多项式求导 (25 point(s))
input1 = input().split(" ")
list1 = []
for i in range(0,len(input1),2):
xishu = int(input1[i])*(int(input1[i+1]))
zhishu = int(input1[i+1])-1
list1.append(str(xishu))
if xishu == 0:
zhishu = 0
list1.append(str(zhishu))
list1 = " ".join(list1)
print(list1)
运行结果,只有6分。。。不知为何错了