单选题

How many times is f() called when calculating f(10)?

发布于 2022-03-03 11:06:36

How many times is f() called when calculating f(10)?
int f(int x) { 
    if(x <= 2) 
        return 1 
    return f(x - 2) + f(x - 4) + 1 
}

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