#include <iostream>
#include <cmath>

using namespace std;

int main() {
     float x1, y1,
           x2, y2;
     float dx, dy;

     float Distance;
     float m;

     x1 = 0;
     x2 = 0;
     y1 = 0;
     y2 = 7;

     dx = x1-x2;
     dy = y1 - y2;

     Distance = sqrt(pow(dx,2)+pow(dy,2));
     cout << "The distance is " << Distance << endl;
}