标签：name open nbsp span bsp AC display family names
好，这是一道巨水题......
1 #include <cstdio> 2 using namespace std; 3 typedef long long LL; 4 int main() 5 { 6 LL a,b; 7 scanf("%lld%lld",&a,&b); 8 printf("%lld",2*b-a); 9 return 0; 10 }
标签：name open nbsp span bsp AC display family names
原文地址：https://www.cnblogs.com/huyufeifei/p/8890452.html
