我比你少一行（滑稽）
```cpp
#include<iostream>
long long Q,l,r,a,b;
int main(){
std::cin>>Q;while(Q--){
std::cin>>l>>r;a=r-l+1,b=l+r;
if(a%2==0) a/=2; else b/=2;
a%=9,b%=9;std::cout<<(a*b)%9<<'\n';
} return 0;
}
```
by Voldermod @ 2018-10-27 16:56:35
```cpp
q,s;long long l,r;sum(long long x){if (x/10)return x%10+sum(x/10);else return x;}main(){for(scanf("%d",&q);q--;s=0){scanf("%lld %lld",&l,&r);for(l=(l+(((r-l)/9)*9));l<=r;++l)s+=sum(l);printf("%d\n",s%9);}return 0;}
```
by Jaanai @ 2018-10-27 16:56:45
~~一行完成~~
by Jaanai @ 2018-10-27 16:57:03
@[jccretsehc](/space/show?uid=102080)
~~这是三行~~
by Calc_ @ 2018-10-27 16:58:40
@[庄邦宇](/space/show?uid=81364) 一行，只是显示不下
by WA鸭鸭 @ 2018-10-27 17:12:33
@[庄邦宇](/space/show?uid=81364) 回去刷题，您是我们机房~~电竞~~OI的希望
by WA鸭鸭 @ 2018-10-27 17:12:57
算法不一样吧@[Voldermod](/space/show?uid=85423)
by Flokirie @ 2018-10-28 12:38:39
```
main(T){long long L,R;for(scanf("%d",&T);T--;)scanf("%lld%lld",&L,&R),printf("%d\n",(R-L+1)%9*(L+R)*5%9);}
```
by 小粉兔 @ 2018-12-01 18:27:37
Orz
by Alviss_lky @ 2019-04-23 23:13:55
@[小粉兔](/user/10703) orz
by QRcode @ 2020-08-04 14:49:11