https://blog.csdn.net/u010982765/article/details/79021426
class Solution {
public:
string PrintMinNumber(vector<int> numbers) {
sort(numbers.begin(),numbers.end(),cmp);
string ans="";
for(int i=0;i<numbers.size();i++)ans+=to_string(numbers[i]);
return ans;
}
static bool cmp(int a,int b)//必须static
{
string s1=to_string(a)+to_string(b);
string s2=to_string(b)+to_string(a);
return s1<s2;
}
};
