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?n?(m+1)??????n = k*(m+1)?k?????A???1?m????B???????m?1?????????m+1????k???????B?????n?(m+1)????A??
?n?(m+1)????n = k*(m+1) + r?1 ? r ? m?A??r????k*(m+1)?B?1?m???A??????????m+1????B??????A??
?n?(m+1)????A?????A??
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