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Suppose that each row of an n×n array A consists of 1’s and 0’s such that, in any row i of A, all the 1’s come before any 0’s in that row. Suppose further that the number of 1’s in row i is at least the number in row i+ 1, for i = 0, 1,...,n− 2. Assuming A is already in memory, describe a method running in O(n) time (not O(n2) time) for counting the number of 1’s in the array A.

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Suppose that each row of an n×n array A consists of 1’s and 0’s such that, in any row i of A, all th...
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