再加一条,如果您用 `define` 求平方记得套括号
```cpp
#define sqr(x) (1LL*(x)*(x))
```
by cjrawa @ 2023-08-07 11:12:00
学会了
by Garbage_fish @ 2023-08-07 11:14:05
直接用 `double` 数组来存每个城市的 x、y 坐标就好了
by _Cheems @ 2023-08-07 11:17:01
@[_Cheems_](/user/514283) 看个人代码习惯,我一般都是用 `int` 来存
by cjrawa @ 2023-08-07 11:21:40
@[sto_yfz_orz](/user/523641) /bx/bx
by 菡萏 @ 2023-08-11 09:59:53
感恩
by in_3 @ 2023-09-10 15:59:24