15 lines
266 B
Rust
15 lines
266 B
Rust
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type tree = tag(nil(), node(@tree, @tree, int));
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fn item_check(&tree t) -> int {
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alt (t) {
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case (nil()) {
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ret 0;
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}
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case (node(@tree left, @tree right, int item)) {
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ret item + item_check(left) - item_check(right);
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}
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}
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}
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fn main() {
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}
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