c++ - 2D vector sort using pointer arithmetics -


new c++, need sort 2d vector

std::vector<std::vector<char>> text2d32;

where char in question 

std::vector<char>wap(32);

but 

std::sort(text2d32.begin(), text2d32.end());

is slow. suggested use pointer arithmetics, don't know how. have working code or function can copy?


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