题目描述

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样例

#include<iostream>
#include<iomanip>
#include<cmath>
using namespace std;
int main() {
    double a, b, c;
    cin >> a >> b >> c;
    double delta = b * b - 4 * a * c;
    if (delta < 0 || a == 0) {
        cout << "Impossivel calcular" << endl;
    }
    else {
        double x1 = ((-b) + sqrt(delta)) / 2 / a;
        double x2 = ((-b) - sqrt(delta)) / 2 /a;

        cout << fixed << setprecision(5) << "R1 = " << x1 << endl;
        cout << fixed << setprecision(5) << "R2 = " << x2 << endl;
    }
    return 0;
}

算法1

(暴力枚举) $O(n^2)$

blablabla

时间复杂度

参考文献

C++ 代码

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算法2

(暴力枚举) $O(n^2)$

blablabla

时间复杂度

参考文献

C++ 代码

blablabla