template<class InputIterator, class OutputIterator, class Predicate>
constexpr OutputIterator
remove_copy_if(InputIterator first, InputIterator last,
               OutputIterator result, Predicate pred);

template<class ExecutionPolicy, class ForwardIterator1,
         class ForwardIterator2, class Predicate>
ForwardIterator2
remove_copy_if(ExecutionPolicy&& exec, ForwardIterator1 first, ForwardIterator1 last,
ForwardIterator2 result, Predicate pred);

#include <iostream>
#include <algorithm>
#include <vector>

int main()
{
    std::vector<int> v4 {1,2,3,4,5};
    std::vector<int> result(v4.size());
    auto end = std::remove_copy_if(std::begin(v4), std::end(v4),
                                   std::begin(result),
                                   [](auto ch) { return ch==1; });

    for (auto it = std::begin(result); it != end; ++it) {
        std::cout << *it << std::endl;
    }
    return 0;
}

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