/*
run this with

        clang fib.c
        (or gcc fib.c)
        time ./a.out

*/
#include <stdio.h>

unsigned int fib(int n) {
        if (n <= 2) return 1;
        else return fib(n - 2) + fib(n - 1);
}

int main() {
        printf("%u", fib(40));
}

/*

run this with

    time node ./fib.js

*/
function fib(n) {
  if (n <= 2) return 1;
  else return fib(n - 2) + fib(n - 1);
}

console.log(fib(40));