class Solution { public: struct Less { bool operator()(int a, int b) { return stoi(to_string(a)+to_string(b)) < stoi(to_string(b)+to_string(a)); } }; string PrintMinNumber(vector<int> numbers) { sort(numbers.begin(), numbers.end(), Less()); string result; for (size_t i = 0; i < numbers.size(); ++ i) result+=to_string(numbers[i]); return result; } };