Function recursive_work

examples/complex_multithreaded_puzzle.cpp:18–23

}

int recursive_work(int n) {
    CTRACK;
    if (n <= 1) return 1;
    sleepy_function(1);
    return recursive_work(n - 1) + recursive_work(n - 2);
}

void nested_function_a(int depth) {
    CTRACK;