biggestNumber.cpp

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

bool cmp(string a, string b) {
	return a + b > b + a;
}

string solution(vector<int> numbers) {
	string answer = "";
	vector<string> temp;

	for (auto num : numbers)
		temp.push_back(to_string(num));

	sort(temp.begin(), temp.end(), cmp);

	if (temp.front() == "0") return "0";

	for (auto num : temp)
		answer += num;

	return answer;
}