fibonacci.hgn


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main := proc() {
    n := read_int(0)
    fib(n)
    exit(0)
}

fib := proc(n) {
    a := 0
    b := 1
    i := 0
    while i < n {
        c := a + b
        a = b
        b = c
        i = i + 1
        # p(i)
    }
    print(a)
}

p := proc(x) {
    x2 := x
}