您告诉我，题里说 圆周率 取多少
by mmr123 @ 2022-04-14 19:05:48
```cpp
#include <iostream>
#include <cmath>
#include <algorithm>
using namespace std;
const int MAX = 1005;
int n, x[MAX], y[MAX], sum, t;
int ans = 1e9;
double pi = 3.1415926535;
int wh(int a, int b, int c, int d) {
return pow(a-c,2)+pow(b-d,2);
}
int main() {
cin >> n;
for (int i = 1; i <= n; ++i) {
cin >> x[i];
cin >> y[i];
}
for (int i = 1; i <= n; ++i) {
sum = 0;
for (int j = 1; j <= n; ++j) {
if (j != i) {
t = wh(x[i], y[i], x[j], y[j]);
sum = max(sum, t);
}
}
ans = min(sum, ans);
}
printf("%.4lf", (double)ans * pi);
}
```
by mmr123 @ 2022-04-14 19:14:41
@[永遠地神](/user/511105) [https://www.luogu.com.cn/record/73903741](https://www.luogu.com.cn/record/73903741)
by mmr123 @ 2022-04-14 19:15:10
哈哈哈
by 亚非胡氏男子 @ 2022-04-15 16:08:27