I need to allocate a vector of rows where row contains a vector of rows. I know that a vector would be contiguous. I wanted to know whether a vector of vectors would also be contiguous. Example code is given below

vector<long> firstRow;

firstRow.push_back(0);

firstRow.push_back(1);

vector<long> secondRow;

secondRow.push_back(0);

secondRow.push_back(1); 

vector< vector < long> > data;

data.push_back(firstRow);

data.push_back(secondRow);

Would the sequence in memory be 0 1 0 1?