@[dong154707974](/user/448552) 是你的快读有问题吧
by SJZ2010 @ 2023-11-17 21:18:31
```cpp
int read()
{
int res(0), f(1), ch(getchar());
while (ch < '0' || ch > '9')
{
if (ch == '-')
f = -1;
ch = getchar();
}
while (ch >= '0' && ch <= '9')
{
res = res * 10 + (ch ^ '0');
ch = getchar();
}
return res;
}
```
by SJZ2010 @ 2023-11-17 21:20:39
@[SJZ2010](/user/809729) 是的我是蒟蒻
by dong154707974 @ 2023-11-19 23:13:21