题意

把数组排成最小的数

方法

排序

代码

class Solution {
public:
    static bool cmp(int a, int b){
        string as = to_string(a), bs = to_string(b);
        return as + bs < bs + as;
    }

    string minNumber(vector<int>& nums) {
        sort(nums.begin(), nums.end(), cmp);
        string res;
        for(int i = 0; i < nums.size(); i ++) res += to_string(nums[i]);

        return res;

    }
};