#include <iostream> #include <string> #include <unordered_map> using namespace std; int main() { unordered_map<string, int> people = {{"John", 32}, {"Adele", 45}, {"Bo", 29}}; int total = 0; for (auto it = people.begin(); it != people.end(); ++it) { total += it->second; } cout << "Total age: " << total; return 0; }