Prove safety offer19: in order from outside to inside in a clockwise order successively print out each digit, 4 X 4 matrix: 1,234,567,891,011,121,314 15 16 1,2 digital sequentially printed out, 3,4,8,12,16,15,14,13,9,5,6,7,11,10.

NoSuchKey

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Origin www.cnblogs.com/wxwhnu/p/11410207.html