題目傳送門：https://pintia.cn/problem-sets/994805260223102976/problems/994805267860930560

題解：

#include<cmath>
#include<string>
#include<iomanip>
#include<iostream>
#include<algorithm>
using namespace std;

int main() {
    int n;
    float num1, num2, max;
    cin >> n;
    
 
float *ans = new float[n];
    for (int i = 0; i < n; i++) {
        cin >> num1 >> num2;
        ans[i] = sqrt(num1*num1 + num2 * num2);
    }
    sort(ans, ans + n);
    cout << setiosflags(ios::fixed) << setprecision(2) << ans[n - 1] << endl;
    return
 
 0;
}

1063 計算譜半徑