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바퀴벌레는 동서남북과 대각선 방향의 타일을 무작위로 선택하여 움직입니다.
모든 타일을 최소 1회 이상 밟게 될때 까지 바퀴벌레는 얼마나 많이 움직여야 할까요?
The cockroach moves randomly across tiles in the four cardinal directions, including east, west, north, south, and diagonal.
How many times must the cockroach move until it has touched every tile at least once?
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2011/10/20
2011/10/20
2011/10/23
2011/10/23