【PAT乙级】1063 计算谱半径

题目链接：1063 计算谱半径

#include <iostream>
#include <math.h>
using namespace std;

int main(){
    int N, a, b;
    double max = 0, c;
    cin >> N;
    for(int i=0;i<N;i++){
        cin >> a >> b;
        c = sqrt((double)(a*a+b*b));
        if(c > max) max = c;
    }
    max = round(max*100);
    max /= 100;
    printf("%.02f",max);
}