| 12345678910111213141516171819 | #include <iostream>#include <nlohmann/json.hpp>using json = nlohmann::json;int main(){    // create an array value    json array = {1, 2, 3, 4, 5};    // get an iterator to one past the last element    json::iterator it = array.end();    // decrement the iterator to point to the last element    --it;    // serialize the element that the iterator points to    std::cout << *it << '\n';}
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