蓝桥杯--谈判

https://www.lanqiao.cn/problems/545/learning/?contest_id=55

#include<bits/stdc++.h>
using namespace std;
#include<cstdio>
int main()
{
    int n,i=1,ans=0;
    scanf("%d",&n);
    int a[n];
    for(int i=0;i<n;i++)
        scanf("%d",&a[i]);
    sort(a,a+n);
    int b[n];
    b[0]=a[0]+a[1];
   for(i=1;i+1<n;i++){
    b[i]=b[i-1]+a[i+1];
   }
   for(i=0;i<n-1;i++){
    ans=ans+b[i];
   }
   printf("%d",ans);
}