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小小的提醒:终于AC了~~~呵呵,不容易啊。提醒如下:
一:确实有K==0的情况,试过了。。。
二:一行中间如果有石头,那么每个缝隙中间只要长度大于等于2,就算一个position。
也就是说,一行的FIELD有可能因为石头的分隔而有多个POSITION。
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