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a | a | b | b | a | b | a | b | c | a |
x | a | a | b | b | a | b | a | b | c | a |
首先平移,對比上下
-1,0,-1<===變成-1,再平移
a | a | b | b | a | b | a | b | c | a |
x | x | x | -1 | a | a | b | b | a | b | a | b | c | a |
-1,0,-1
中間不符合首字的都列為-1
最後可得解答:-1,0,-1,-1,0,-1,0,-1,-1,0
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