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// unordered_multiset::empty
#include <iostream>
#include <string>
#include <unordered_set>
int main ()
{
std::unordered_multiset<std::string> first;
std::unordered_multiset<std::string> second = {"mom","dad","son","daughter","son"};
std::cout << "first " << (first.empty() ? "is empty" : "is not empty" ) << std::endl;
std::cout << "second " << (second.empty() ? "is empty" : "is not empty" ) << std::endl;
return 0;
}
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