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Problem 1003
反射回起点之后还能继续反射吗?
comzyh
| 2015-09-05 19:43:07
Author
RT 比如 N= 3 Ans 是 2 还是 3
comzyh
| 2015-09-05 19:46:10
# 1
看错题Sorry。。
admin
| 2015-09-05 19:46:29
# 2
No,光线反射N次后首次回到起点
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