【hdu
<div class="postcontent"><div id="cnblogs_post_body">百步穿杨Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 3420 Accepted Submission(s): 1311
<div class="panel_title" align="left">Problem Description
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