1063. 计算谱半径(20)

超简单题#include<cstdio>
#include<cmath>
int main()
{
int n;
//freopen("1063.txt","r",stdin);
scanf("%d",&n);
double x,y,maxn=-1;
for(int i=0;i<n;i++)
{
scanf("%lf %lf",&x,&y);
if(x*x+y*y>maxn) maxn=x*x+y*y;
}
printf("%.2f",sqrt(maxn));
}