hdu_2669 Romantic(扩展欧几里得)

题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=2669 Romantic Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 4179    Accepted Submission(s): 17

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