@[Andy_zhou](/user/308055)
```cpp
#include<iostream>
#include<cstdio>
#include<algorithm>
using namespace std;
struct people{
int num;
int ti;
};
bool cmp(const people&a, const people&b)
{
if(a.ti<b.ti)
{
return 1;
}else{
return 0;
}
}
int main()
{
int n;
cin>>n;
people gw[n];
for(int i=0;i<n;i++)
{
cin>>gw[i].ti;
gw[i].num=i+1;
}
sort(gw,gw+n,cmp);
for(int i=0;i<n;i++)
{
cout<<gw[i].num<<" ";
}
cout<<endl;
double ans=0;
for(int i=0;i<n;i++)
{
ans+=gw[i].ti*(n-i - 1);
}
printf("%.2f\n",ans/n);
return 0;
}
```
by Brian_WBY @ 2020-07-03 21:43:45
@[Brian_WBY](/user/297433) 谢谢帮助，后来才发现自己sort排错了
by __Andy_zhou__ @ 2020-07-04 20:58:45