跟方法2类似，也是做标记，这一次是加上一个大于n的数（因为题目给了n的border），最后check一下就好。为不超Integer.MAX_VALUE, 每次加n前，取余数。 做标记的方法固然快，但是相对来说比较hacky ...
In Java, an array is a data structure that can store a fixed-size sequence of elements of the same data type. In Java, you can create multidimensional arrays with two or more dimensions. A ...
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