[백준]11399 - ATM(설명X)

#include <iostream>
#include <algorithm>
using namespace std;
 
int main() {
    int N;
    cin >> N;
    int* arr = new int[N];
    for (int i = 0; i < N; i++)
        cin >> arr[i];
    sort(arr, arr + N);
    int time = 0;
    for (int i = 0; i < N; i++)
        for (int j = 0; j <= i; j++)
            time += arr[j];
 
    cout << time << endl;
}