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#8735. 道路监控
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The problem was used in the following contests:
IOI 2011 中国国家队选拔赛暨精英赛 (CTSC 2011) Day 1
Upload a .zip file containing road1.out,road2.out,road3.out,road4.out,road5.out,road6.out,road7.out,road8.out,road9.out,road10.out:
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