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Problem 1002
1002 样例 没有出边呀
qscqesze
| 2016-01-02 19:14:08
Author
1002 样例 没有出边呀 RT
admin
| 2016-01-02 19:15:19
# 1
题目里写了一定有的
admin
| 2016-01-02 19:15:44
# 2
数据保证一定存在
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