C++(씨쁠쁠)(cplusplus)-백준(baekjoon)(BaekJoon)코딩 1427번:소트인사이드 답

#include <iostream>
#include <string>
using namespace std;
int compare(const void *a, const void *b)
{
    return *(int *)b - *(int*)a;
}
int main() {
    string num;
    cin >> num;
    int *arr = new int[num.size()];
    for (int i = 0; i < num.size(); i++)
    {
        arr[i] = num[i] - '0';
    }
    qsort(arr, num.size(), sizeof(int), compare);
    for (int i = 0; i < num.size(); i++)
    {
        cout << arr[i];
    }
}