@[ll12313123123](/user/1068867) 是不是没开 long long。
by xiaoshumiao @ 2024-01-26 22:03:35
sum的极限值可以到1e10!!
sum开long long，输出也改成
```cpp
printf("%lld",sum);
```
就能AC了
by Hgvuryg27 @ 2024-01-31 17:22:27
@[ll12313123123](/user/1068867)
忘记@了。。。
by Hgvuryg27 @ 2024-01-31 17:27:30