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Problem 1001
恰好走K步到达某个点的意思是走完K步后第一次到达该点嘛?
qaz69328922
| 2016-01-02 19:40:36
Author
恰好走K步到达某个点的意思是走完K步后第一次到达该点嘛?
admin
| 2016-01-02 19:43:27
# 1
走完K步后恰好在这个点
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