题解 | #牛牛的加减器#
牛牛的加减器
https://www.nowcoder.com/practice/13e575e3bd4b4ed0aba7be2fa1efcb3f
x=int(input())
y=int(input())
sum=x+y
sub=x-y
print(f'{sum}\n{sub}')
#print(sum,sub,sep="\n")
y=int(input())
sum=x+y
sub=x-y
print(f'{sum}\n{sub}')
#print(sum,sub,sep="\n")