Solution

• 字符串比较

class Solution {
public:
    string PrintMinNumber(vector<int> numbers) {
        vector<string> record;
        for (int num : numbers) {
            record.push_back(to_string(num));
        }
        
        auto cmp = [](string& lhs, string& rhs) {
            return lhs+rhs < rhs+lhs;
        };
        
        sort(record.begin(), record.end(), cmp);
        string ss;
        for (string& s : record) {
            ss += s;
        }
        return ss;
    }
};