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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def __find_smallest(self):
 """Find the smallest uncovered value in the matrix."""

        minval = sys.maxsize
        for i in range(self.n):
            for j in range(self.n):
                if (not self.row_covered[i]) and (not self.col_covered[j]):
                    if minval > self.C[i][j]:
                        minval = self.C[i][j]
        return minval