문제는 다음과 같습니다.

https://www.acmicpc.net/problem/11399

　
import java.util.Scanner;

public class ATMTest {
	public static void main(String[] args){
		System.out.println("백준알고리즘 11399번 ATM");
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt(); //인원 수 입력
		int[] people = new int[N]; //배열 생성
		for(int i=0; i<N; i++){
			people[i] = sc.nextInt();
		}
		for(int i=0; i<people.length; i++){ //정렬
			for(int j=i+1; j<people.length; j++){
				if(people[i]>people[i+1]){
					int imsi = people[i];
					people[i] = people[i+1];
					people[i+1] = imsi;
				}
			}
		}
		int min=0;
		for(int i=0; i<people.length; i++){
			for(int j=0; j<=i; j++){
				min += people[j];
			}
		}
		System.out.println(min);
	}
}
　

결과는 다음과 같습니다.