C++：斐波那契数列

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#include<cstdio>

int f(int n)
{
    if(n == 0||n == 1)
        return 1;
    else
        return f(n-1)+f(n-2);
}
int main()
{
    int n;
    scanf("%d",&n);
    printf("%d\n",f(n));
    return 0;
}