题解 | #把数组排成最小的数#

class Solution {
public:
    string PrintMinNumber(vector<int> numbers) {
        vector<string> ns;
        for (auto &i: numbers) {
            ns.push_back(to_string(i));
        }
        sort(ns.begin(), ns.end(), [](string &a, string &b) {
            return a + b < b + a;
        });
        string res;
        for (auto &i: ns) res += i;
        return res;
    }
};