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program squares;
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var
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i : integer;
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begin;
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for i := 0 to 20 do
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Write(i*i, ' ');
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Writeln;
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i := 0;
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while i <= 20 do
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begin
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Write(i*i, ' ');
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i := i+1;
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end;
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Writeln;
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i := 0;
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repeat
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begin
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Write(i*i, ' ');
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i := i+1;
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end;
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until i > 20;
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end. |