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Collections.sort(list);是个好东西
但是要学会排列
然后你才能浪
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算法
1 import java.util.*; 2 public class Main { 3 public static void main(String[] args) { 4 Scanner sc = new Scanner(System.in); 5 ArrayList<Integer> list = new ArrayList<Integer>(); 6 int n = sc.nextInt(); 7 for(int i=0;i<n;i++) 8 list.add(sc.nextInt()); 9 Collections.sort(list); 10 System.out.println(list.get(list.size()-1)); 11 System.out.println(list.get(0)); 12 int x = 0; 13 for(int i:list) 14 x += i; 15 System.out.println(x); 16 } 17 }