// This program displays the fibonacci sequence
import os

fn main() {
    // Check for user input
    if os.args.len != 2 {
        println('usage: fibonacci [rank]')

        return
    }

    // Parse first argument and cast it to int

    stop := os.args[1].int()
    // Can only calculate correctly until rank 92
    if stop > 92 {
        println('rank must be 92 or less')
        return
    }

    // Three consecutive terms of the sequence
    mut a := i64(0)
    mut b := i64(0)
    mut c := i64(1)
    println(a + b + c)
    for _ in 0 .. stop {
        // Set a and b to the next term
        a = b
        b = c
        // Compute the new term
        c = a + b

        // Print the new term
        println(c)
    }
}