911. Квадратное уравнение

//911. Квадратное уравнение
//zadacha from e-olimp

#include<iostream>
#include<cmath>
#include<cstdlib>
#include<cstdio>
using namespace std;
int main()
{
   int a,b,c,x1,x2;
   double d;
   cin>>a>>b>>c;
   d=b*b - 4 * a * c;
   x1=(-b + sqrt(d)) / 2 * a;
   x2=(-b - sqrt(d)) / 2 * a;
   if (d < 0) {cout<<"No roots"<<endl; exit(0);}
   if (d == 0) {cout<<"One root:"<<" "<<x1<<endl; exit(0);}
   if (d > 0) {
      if (x1 < x2) {cout<<"Two roots:"<<" "<<x1<<" "<<x2<<endl; exit(0);}
      if (x1 >= x2) {cout<<"Two roots:"<<" "<<x2<<" "<<x1<<endl; exit(0);}
              }
}