#include <cstdlib>
#include <iostream>
#include <cmath>
using namespace std;
int main()
{
float a;
float b;
float d;
cout<<„unesi stranicu pravougaonika a=“;
cin>>a;
cout<<endl;
cout<<„unesi stranicu pravougaonika b=“;
cin>>b;
cout<<endl;
d=sqrt(a*a+b*b);
cout<<„dijagonala pravougaonika je“<<“ „;
cout<<d<<endl;
return 0;
}