template<class InputIter, class OutputIter, class T>
constexpr OutputIter
remove_copy(InputIter first, InputIter last,
            OutputIter result, const T& value);

template<class ExecutionPolicy, class ForwardIter1,
         class ForwardIter2, class T>
ForwardIter2
remove_copy(ExecutionPolicy&& exec, ForwardIter1 first, ForwardIter1 last,
            ForwardIter2 result, const T& value);

#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(std::begin(v4), std::end(v4),
                                std::begin(result), 1);

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

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