Taken from here:
auto x = std::max_element(m.begin(), m.end(), [](const pair<int, int>& p1, const pair<int, int>& p2) { return p1.second < p2.second; });This, rather than using std::map::value_comp() (which compares the key values) looks at the second member in the pair, which contains the value. This uses a lambda expression, so you will have to compile with C++11 support
reference:
[1]. http://www.itkeyword.com/doc/1853552888236090x489/find-element-with-max-value-from-stdmap
