Orz xMinh Orz
by Juan_feng @ 2018-12-11 18:23:30
`stringstream`吼啊
by ghj1222 @ 2018-12-11 18:53:38
其实res=res*10+ch-'0'可以改成:res=(res<<3)+(res<<1)+(ch^ch)
用二进制更快QvQ
by 晚安晚安 @ 2018-12-11 19:00:23
```cpp
register char *ipos = (char*)mmap(NULL, lseek(0, 0, SEEK_END), PROT_READ, MAP_PRIVATE, 0, 0);
```
by EndSaH @ 2018-12-11 19:20:14
orz dijkstra
by nianheng @ 2018-12-11 19:28:57
@[废柴叔丿](/space/show?uid=119118) 编译器不是自动优化这个常数吗？
by d3NtMDAw @ 2019-02-19 08:41:37
@[废柴叔丿](/space/show?uid=119118) 其实您没发现这两个速度是一样的吗……速度不会有任何改变，看着快些罢了
by 无意识躺枪人 @ 2019-07-22 14:10:13
@[LZXKJ](/space/show?uid=87931) %%%%%%%%%%%%%%%%%%%%%%%%
by __wfx @ 2019-07-24 08:34:20
@[晚安晚安](/user/119118) 然而似乎并不是，有道题我就用这个死活过不去，换成*10还快了好几百毫秒
by loceaner @ 2020-02-14 17:13:00
@[loceaner](/user/198323) 不可能的,自己写错了
by 春待ち @ 2020-02-16 22:53:26