#include<bits/stdc++.h>
using namespace std;
double a,b,c,x1,x2,s;
int main()
{
	cin >> a >> b >> c ;
	s = b * b - 4 * a * c ;
	x1 = (-b + sqrt(s)) / (2 * a) ;
	x2 = (-b - sqrt(s)) / (2 * a) ;
	if (s > 0)
	{
		printf("x1=%0.5lf;x2=%0.5lf" , x1 , x2);
	}
	else if (s == 0)
	{
		printf("x1=x2=%0.5lf",x1);
	}
	else
	{
		printf("No answer!") ;
	}
	return 0;	
}

样例能过

1 1 1也能过

为啥是70分

喵~?