摘要： 描述 There is a matrix only contains uppercase letters. Try to find a word in this matrix. You can go toward four directions (top, bottom, left, right), 阅读全文

摘要： 描述 It was a dark and stormy night that ripped the roof and gates off the stalls that hold Farmer John's cows. Happily, many of the cows were on vacati 阅读全文