#include<cmath> #include<math.h> M_PI或者acos(-1)//兩種都可以
模擬退火篇： https://www.cnblogs.com/peng-ym/p/9158909.html https://blog.csdn.net/numberer/article/details/79996753 https://b
%d：用於int %ld：用於long %lld：用於longlong %f：float %lf：double
