[XSY4220] 九万步(结论)

手动构造发现 x = 6 x=6 x=6 时是可行的

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x
x x
x x x
x x x x
x x x x x
x x x x x x
x x x x x x x
x x x x x x x x
x xx x x x x
x x x x x
x x x x
x x xx x
x xx x
x x x x x
x x x x
x x x
x x
x

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Origin blog.csdn.net/Emma2oo6/article/details/121335789