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Domains. treetype = tree(string, treetype, treetype);




treetype = tree(string, treetype, treetype);

empty()

,

:

tree(1,

tree(2,

tree(4, empty, empty),

tree(5, empty, empty)),

tree(3,

tree(6, empty, empty),

tree(7, empty, empty)))

. , , , . . , , . . ([]), . [] , . . , , , : . . , , . , .

:

[1, 2, 3]

1 , [2, 3]

2 , [3]

3 , []

X Y. [X|Y], X Y . X , Y .
[1, 2, 3] [X|Y] X 1, Y [2, 3]. .

list, :

type list = ^TElemList;

TElemList = record;

Inf: char;

Next: list;

end;

:





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