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    #跟帖#  it works only by removing odd number of row or column. [腦筋急轉] - compound(0 bytes ) 2009-05-01
    #跟帖#  sorry, it 20grid. Then 101x20 =2020, remove 11 can be done. [腦筋急轉] - compound(0 bytes ) 2009-05-01
    #跟帖#  answer (圖) [腦筋急轉] - compound(349 bytes ) 2009-05-01
    #跟帖#  oops! [腦筋急轉] - compound(0 bytes ) 2009-05-01
    #跟帖#  dayuwang is correct. [腦筋急轉] - compound(0 bytes ) 2009-02-23
    #跟帖#  第一證明是對的,第二是錯的. [腦筋急轉] - compound(66 bytes ) 2009-02-23
    #跟帖#  answer [腦筋急轉] - compound(21 bytes ) 2009-02-20
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