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

/* Compute 2^x */
double e2(double x) {
  return pow(2, x);
}

int main(int argc, char *argv[]) {
  int i;
  for (i = 1; i < argc; i++) {
    double x = atof(argv[i]);
    double p = e2(x);
    printf("2 to the %.2f --> %.2f\n", x, p);
  }
  return 0;
}