Cercuri

#include <iostream>
#include <cmath>
using namespace std;

int main()
{
    float r1,x1,y1,r2,x2,y2,d,dif;
    cin>>r1>>x1>>y1>>r2>>x2>>y2;
    d=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
    dif=abs(r1-r2);
    if(r1==r2&&x1==x2&&y1==y2)
        cout<<"infinit";
    else
        if(d>r1+r2||d<dif)
            cout<<0;
        else
            if(d==r1+r2||d==dif)
                cout<<1;
            else
                cout<<2;
    return 0;
}