其实我的问题是样例过了却零分？！
```cpp
#include <iostream>
#include <cstdio>
#include <cmath>
#include <algorithm>
using namespace std;
const double pi=3.1415926535;
int n;
int x[1009],y[1009];
inline double dist(int a,int b,int c,int d){
return sqrt((a-b)*(a-b)+(c-d)*(c-d));
}
inline double area(double r){
return pi*r*r;
}
int main(int argc, char** argv) {
double mmax=0,mmin=2147364847;
scanf("%d",&n);
for(int i=1;i<=n;i++)
scanf("%d%d",&x[i],&y[i]);
for(int i=1;i<=n;i++){
for(int j=1;j<=n;j++){
double dis=dist(x[j],x[i],y[j],y[i]);
mmax=max(mmax,dis);
}
mmin=min(mmin,mmax);
}
printf("%.4f\n",area(mmin));
return 0;
}
```
by 霹雳搅屎棍 @ 2018-08-27 11:45:58
帮你@管理员：
@[chen_zhe](/space/show?uid=8457) @[yjjr](/space/show?uid=5088)
by agicy @ 2018-08-27 11:47:54
@[agicy](/user/38502) 6（考古）
by Yun_Mengxi @ 2023-03-23 17:47:58