题目描述

blablabla

样例

blablabla

算法1

(暴力枚举) $O(n^2)$

blablabla

时间复杂度

参考文献

C++ 代码

blablabla

算法2

(暴力枚举) $O(n^2)$

blablabla

时间复杂度

参考文献

C++ 代码

include [HTML_REMOVED]

include [HTML_REMOVED]

include [HTML_REMOVED]

using namespace std;

int main(){
double x1, x2, y1, y2;
cin >> x1 >> y1 >> x2 >> y2;
printf(“%.4f”, sqrt( (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2) ));
return 0;
}
```