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procedure foo(a, b, c : intege

[填空题]
procedure foo(a, b, c : integer);
begin
  if a > b then foo(c, a, b)
  else writeln(a, ',', b, ',', c);
end;
var
  a, b, c : integer;
begin
  read(a, b, c);
  foo(a, b, c);
end.

输入:3 1 2
输出:1

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