#include <iostream>
#include <cmath>

int main() {
    double x1 = 3.0, y1 = 4.0; // نقطه A
    double x2 = 6.0, y2 = 8.0; // نقطه B
    
    double distance = hypot(x2 - x1, y2 - y1);
    
    std::cout << "فاصله بین نقاط A و B: " << distance << std::endl;
    
    return 0;
}