@[要好](/space/show?uid=92100)
```cpp
add(tmp+j,tmp+m+j+1,x);
add(tmp+m+1+j,tmp,x);
```
第二行........tmp + j
by 向noip冲刺 @ 2018-07-14 07:43:53
蟹蟹
by ComplexPug @ 2018-07-14 07:44:23