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


int main()
{
 // Get north/east distances
 float north, east;
 cout << "How far north? ";
 cin >> north;
 cout << "How far east? ";
 cin >> east;

 // Output distance
 cout << "Straight distance "
      << sqrt(pow(north,2)+pow(east,2))
      << endl;

 return 0;
}