#include <cilk/cilk.h>
#include <assert.h>

int fib(int n) {
    if (n < 2)
        return n;
    int a = cilk_spawn fib(n-1);
    int b = fib(n-2);
    cilk_sync;
    return a + b;
}

int main() {
    int result = fib(29);
    //assert(result == 832040);
    printf("Usage: fib [workers] %d\n", result);
    
    printf("Calculated inf seconds using %d workers.\n", __cilkrts_get_nworkers());
    
    return 0;
}