谈判(贪心算法)
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 9
int 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 9
list.remove(0);//5 9
list.add(c);//5 9 4
Collections.sort(list);//4 5 9
}
System.out.println(sum);
sc.close();
}
}