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#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
auto absolute = [](auto& x)->float{ return x<0?-x:x;};
int main()
{
auto absoluteLess = [&](auto&x, auto&y)->bool{ return absolute(x)>absolute(y);};
auto absoluteGreater = [&](auto&x, auto&y)->bool{ return absolute(x)<absolute(y);};
std::vector<float> input={-2.0, 0.0, 3.4, -123.0};
std::cout << *std::max_element(input.begin(), input.end(), absoluteLess) <<std::endl;
std::cout << *std::max_element(input.begin(), input.end(), absoluteGreater) <<std::endl;
return 0;
}
