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1.
1)첫번째사진에 각각 격자에 0하고 1이 있어야지 문제풀수있는거지?
2) 격자의직적은 어케하는거임?


2.두번째 사진 a번 설명못하겟음..


3.세번째 사진 d e번좀 도와줘요