package com.company;
    import java.util.Scanner;
    import java.util.Random;
        public class Main {
            public static double(double a, double b, double c);
    {
        int a = in.nextInt();
        int b = in.nextInt();
           c = Math.sqrt(a*a + b*b);
            return c;
          }

          public static void main(String[] args) {
          Scanner in = new Scanner(System.in);
         System.out.println();
      }
}