#include <stdio.h>
#include <math.h>

int main() {
    int r, h;
    scanf("%d", &r);
    scanf("%d", &h);

    if (r < 0 || h < 0) {
        printf("Invalid input\n");
    } else {
        double surfaceArea = 2 ** r * (r + h);
        printf("Surface Area: %.2f\n", surfaceArea);
    }

    return 0;
}