program ideone;
uses SysUtils;
var A,B,D,C:TTime;
begin
A:=StrToTime('10:00:00');
B:=StrToTime('10:30:00');
C:=StrToTime('00:30:00');
D:=B-A;
WriteLn('A=',A,';');
WriteLn('B=',B,';');
WriteLn('C=',C,';');
WriteLn('D=',D,';');
WriteLn('C-D=',C-D,';');
end.
cHJvZ3JhbSBpZGVvbmU7Cgp1c2VzIFN5c1V0aWxzOwoKdmFyIEEsQixELEM6VFRpbWU7CmJlZ2luIAogIEE6PVN0clRvVGltZSgnMTA6MDA6MDAnKTsKICBCOj1TdHJUb1RpbWUoJzEwOjMwOjAwJyk7CiAgQzo9U3RyVG9UaW1lKCcwMDozMDowMCcpOwogIEQ6PUItQTsKCiAgV3JpdGVMbignQT0nLEEsJzsnKTsKICBXcml0ZUxuKCdCPScsQiwnOycpOwogIFdyaXRlTG4oJ0M9JyxDLCc7Jyk7CiAgV3JpdGVMbignRD0nLEQsJzsnKTsKICBXcml0ZUxuKCdDLUQ9JyxDLUQsJzsnKTsKZW5kLg==