Problem

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荣誉单位

Problem

输入是一个数字 n。打印一个大小为 n by n的数组，其中偶数索引的行包含 1，其余 —零。
 
例子
<头> <正文>

time 1000 ms
memory 256 Mb
Rules for program design and list of errors in automatic problem checking

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# 输入 输出
1 5 [[1 1 1 1 1]
 [0 0 0 0 0]
 [1 1 1 1 1]
 [0 0 0 0 0]
 [1 1 1 1 1]]