原来是二分谁对平均分贡献大选谁界限<0.001,100次足矣#include<iostream>#include<cstdio>#include<algorithm>#include<cstring>usingnamespacestd;constintmaxn=1010;intn,k;doublemid;structNode{ doublea,b;}w[maxn];boolcmp(Nodex,Nodey