#include <bitset>
#include <cstdint>
#include <vector>
#include <algorithm>

int main()
{
    std::vector <uint8_t> buffer(100, 0);
    std::bitset<37> b;
    int i = 0;
    std::for_each(buffer.begin() + 20, buffer.begin() + 57, [&](uint8_t val)
    { b[i] = val; ++i; });
}