```cpp
while(x[now]+lg<=x[i]) {
if (f[now] != -inf) {
while(head<=tail && f[q[tail]]<=f[now])
--tail;
q[++tail]=now;
}
now++;
}
```
加一个判断f[now]就行了
by Alchemania @ 2021-05-02 22:16:39
~~没关注大佬~~
by Australia @ 2021-08-13 10:25:05