#include <iostream>
#include <set>
using namespace std;
int main() {
// 创建存储汽车品牌的集合 cars
set<string> cars = {"Volvo", "BMW", "Ford", "Tesla"};
// 打印集合中的汽车品牌
for (string car : cars) {
cout << car << "\n";
}
return 0;