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

static const double E = 2.718281828459045;

void sin_h(int* input) { //sinh x = 1/2(e**x-e**(-x))
    double sinh = 1;
    unsigned int i;
    for (i=0; i<*input;i++) { // ^x
        sinh *= E; 
    }
    printf("sinh(x) = %f\n", sinh/2);
}

int main() {
    int input;
    scanf("%d", &input);
    sin_h(&input);
    printf("%f\n", sinh(input));
}