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When I create a 2-dimensional vector in c++ such as
vector < vector<int> > matrix(3, vector<int>(4));
would matrix[2][3] be accessible or would matrix[3][2] be accessible?
You created the first dimension as 3 and the second as 4. That means that
matrix[3]is out of bounds. The other way around, though, would be fine- and would be fine regardless of which is which.