二分出这一部分 RE：
```cpp
for (int j = 1; j <= 20; j++)
{
for (int i = 1; i <= n; i++)
{
st[i][j] = ask(st[i][j - 1], st[i + (1 << (j - 1))][j - 1]);
}
}
```
by __LiChangChao__ @ 2023-10-04 22:13:55
找到死因：
```cpp
i + (1 << (j - 1))
```
$j=20,2^{j-1}>10^{5}$
by __LiChangChao__ @ 2023-10-04 22:22:14
@[fansj](/user/751264)
by __LiChangChao__ @ 2023-10-04 22:22:45
还有，没过样例
by __LiChangChao__ @ 2023-10-04 22:25:49
你什么时候学到NOI了
by _GJM_ @ 2023-10-04 23:04:28
~~进步神速~~
by _GJM_ @ 2023-10-04 23:05:18
@[changwenxuan](/user/794383) 蟹蟹
by fansj @ 2023-10-05 07:52:43