import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int x = sc.nextInt() * 2;
        int y = sc.nextInt() * 2;
        int left = 0;
        int right = Integer.MAX_VALUE;
        while (right - left > 1) {
            int m = (left + right) / 2;
            if (Math.pow(x, 2) + Math.pow(y, 2) < Math.pow(m, 2)) {
                right = m;
            } else {
                left = m;
            }
        }
        System.out.println(right);
    }
}