#include
using namespace std;
int main()
{
int a, b, c;
cin>>a;
cin>>b;
cin>>c;
if(a*a+b*b==c*c)
{cout<<"numerele pot fi laturi"<cout<<"aria="<<(float)a*b/2;
cout<<"perimetrul="<}
else
if(a*a+c*c==b*b)
{cout<<"numerele pot fi laturi"<cout<<"aria="<<(float)a*c/2;
cout<<"perimetrul="<}
else
if(b*b+c*c==a*a)
{cout<<"numerele pot fi laturi"<cout<<"aria="<<(float)b*c/2;
cout<<"perimetrul="<}
else
cout<<"numerele nu pot fi laturile unui triunghi";
}