#include <stdio.h>

int main(int argc, char *argv[])
{
  int x = atoi(argv[1]);
  printf("The %dth value is %d\n", x, fib(x));
}

int fib(int x)
{
  int result1 = 0;
  int result2 = 1;
  int i;
  for (i = 0; i < x; i++) {
    int result = result1 + result2;
    result2 = result1;
    result1 = result;
  }
  return result1;
}