题目

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Scanner;public class Main {public static void main(String[] args) {		Scanner sc = new Scanner(System.in);int n = sc.nextInt();sc.nextLine();List<Integer> list = new ArrayList<>();for(int i=0;i<n;i++) {int x = sc.nextInt();list.add(x);}Collections.sort(list);//1 3 5 9int sum = 0;while(list.size()!=1) {int a = list.get(0);int b = list.get(1);int c = a+b;sum+=c;list.remove(0);//3 5 9list.remove(0);//5 9list.add(c);//5 9 4Collections.sort(list);//4 5 9}System.out.println(sum);sc.close();}
}