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std::map<int, std::string> example = {{1, "Cat"}, {2, "Panda"}};
int check_key = 1;
if (example.contains(check_key)) {
std::cout << check_key << ": Found a " << example.at(check_key) << std::endl;
} else {
std::cout << check_key << ": Not found" << std::endl;
}