mily: 宋体; font-size: 12pt;">1&lt;=x,y&lt;=N</span><span style="font-family: 宋体; font-size: 12pt;">，<span lang="EN-US" style="font-family: arial, verdana, helvetica, sans-serif;">A</span>是正整数<span lang="EN-US" style="font-family: arial, verdana, helvetica, sans-serif;"><o:p></o:p></span></span></p>
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