//vi tri tuong doi cua 2 hinh tron
#include"iostream"
using namespace std;
void main()
{
int r1,r2,d;
cout<<"nhap R1: ";
cin>>r1;
cout<<"nhap R2: ";
cin>>r2;
cout<<"nhap D: ";
cin>>d;
cout<<"2 duong tron ";
if((r1+r2)==d)
cout<<"tiep xuc ngoai"<<endl;
if((r1+r2)<d)
cout<<"tach nhau"<<endl;
if(((r1+r2)>d)&&(d!=0))
cout<<"cat nhau"<<endl;
if(((r1+d)==r2)&&(d!=0)||((r2+d)==r1)&&(d!=0))
cout<<"tiep xuc trong"<<endl;
if(((r1+d)<r2)||((r2+d)<r1))
cout<<"bao nhau"<<endl;
if(((r1-r2)==0)&&(d==0))
cout<<"trung nhau"<<endl;
}