size of unordered_set
#include <iostream>
#include <unordered_set>
int main() {
std::unordered_set<int> mySet;
// Insert elements into the unordered_set
mySet.insert(10);
mySet.insert(20);
mySet.insert(30);
// Get the size of the unordered_set
size_t setSize = mySet.size();
// Display the size of the unordered_set
std::cout << "Size of the unordered_set: " << setSize << std::endl;
return 0;
}