Rain vs City

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You are given an n*m matrix A. A[1][1] is the top-left cell, and A[n][m] is the bottom-right cell. You want to fill a matrix B[n][m] using the following pseudo code. All the entries of matrix B are zero initially. randomInt(a, b) returns an uniform random integer between a and b (both inclusive). That is, all the b-a+1 integers have an equal probability of being returned. For x = 1 to n:

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solution.cppC++17

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