B1063 计算谱半径

题目：https://pintia.cn/problem-sets/994805260223102976/problems/994805267860930560

#include<cstdio>
#include<algorithm>
#include<cmath>
int main(){
    int n;
    int a, b;
    double temp, ans = 0;
    scanf("%d", &n);
    for(int i = 0; i < n; i++){
        scanf("%d %d", &a, &b);
        temp = sqrt(a * a * 1.0 + b * b);
        ans = std::max(ans, temp);
    }
    printf("%.2f", ans);
}