A.Eming（13.7.7）

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A.Eming

Eming is a contest hold by WHUACM trainingteam. The aim is to select new members of the team.

Usually, the first problem is a very simpleproblem such as “a+b problem”. But this time, Xioumu is tired of this kind of problem,he decide to solve “a and b problem”.

Give you the result of a + b and a^2 – b^2,please output the result of a and b.

Input

There are several test cases. For each casethere are two double numbers indicating a+b and a^2-b^2. You may assume that a+bwill not be zero.

Output

For each case please output the result of aand b in one line, rounded to 2 decimal places.

SampleInput

3 -3

SampleOutput

1.00 2.00

这个题目就是给了a,b的关系，求出a,b的值，通过简单的数学推导，就可以得到a,b的通式，然后用C++写出来，注意语法错误即可

代码：

#include<iostream>#include<iomanip>using namespace std;int main(){double c,d,a,b;while(cin>>c>>d){a=(d+c*c)/(2*c);b=c-a;cout<<setiosflags(ios::fixed)<<setprecision(2)<<a<<" "<<b<<endl;}return 0;}

输出是注意输出格式和保留小数个数，基本没什么问题