43 lines
736 B
Plaintext
43 lines
736 B
Plaintext
program Long_year;
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{$APPTYPE CONSOLE}
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{$R *.res}
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uses
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System.SysUtils;
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function p(const Year: Integer): Integer;
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begin
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Result := (Year + (Year div 4) - (Year div 100) + (Year div 400)) mod 7;
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end;
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function IsLongYear(const Year: Integer): Boolean;
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begin
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Result := (p(Year) = 4) or (p(Year - 1) = 3);
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end;
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procedure PrintLongYears(const StartYear: Integer; const EndYear: Integer);
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var
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Year, Count: Integer;
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begin
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Count := 0;
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for Year := 1800 to 2100 do
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if IsLongYear(Year) then
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begin
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if Count mod 10 = 0 then
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Writeln;
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Write(Year, ' ');
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inc(Count);
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end;
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end;
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var
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Year: Integer;
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begin
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Writeln('Long years between 1800 and 2100:');
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PrintLongYears(1800, 2100);
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Readln;
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end.
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