#include <iostream>
#include <math.h>

using namespace std;

int main()
{ struct punct {int x,y;};
struct dreptunghi {punct st_s,dr_j;}drpt;
cout<<"coordonate colt stanga sus - x: "; cin>>drpt.st_s.x;
cout<<"                           - y: "; cin>>drpt.st_s.y;
cout<<"coordonate colt dreapta jos - x: "; cin>>drpt.dr_j.x;
cout<<"                           - y: "; cin>>drpt.dr_j.y;;
cout<<"diagonala dreptunghiului este ";
cout<<sqrt(pow(drpt.st_s.x-drpt.dr_j.x,2)+pow(drpt.st_s.y-drpt.dr_j.y,2));

}