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// run-pass
pub fn main() { assert!((even(42))); assert!((odd(45))); }
fn even(n: isize) -> bool { if n == 0 { return true; } else { return odd(n - 1); } }
fn odd(n: isize) -> bool { if n == 0 { return false; } else { return even(n - 1); } }
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