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400 ??? ??? 1 ??? ??? ???? 50 ??? ???? 1 ???? ???, ????? � ???? ???? 1 ?? ???? 250 ??? ???? � ?????? ???? ????:
1. ??????? ????? ??????, ?? ?? ??????? ????? ????? ?? ????, ??????? ????? ?? ???? ??? ????. 2. ?????? ?? ???? ??????? ???? ???????? ????? ???? ?- � ???. 3. ?????? ?? ???? ???? ????? ????? ?? 1 ?"? ??????? ?? ?????, ????? ???? 2/3 ???? ?????. 4. ?? ? - 1/3 ???? ???? ??? ????? ?????, ?????? ?? ???? ?????? ????? ??? ????? ?????? ??? ?????, ?? ????? ???? ??? ???? ??? ????? ?? ????? ?????. 5. ???????: ?? ???? ?????? ??? 3 ????? ????? ???, ???????? ?? ?????, ?????? ?? ???? ????? ??????? ????? ??? 1/3 ?-2/3 ?????? ?????? ????? ??? ????. ??? ????? ?????? ?? ?????? ????? ???? ??? ???.
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