结尾j++改成j--
by 吃蛋包饭的XNN @ 2023-10-04 16:53:17
~~~
for(int i=0;i<n;i++){
for(int j = i;j>0;j++)
time2+=a[j].time;
}
~~~
改为
~~~
for(int i=0;i<n;i++){
for(int j = i;j>0;j--)
time2+=a[j].time;
}
~~~
原因：倒着for循环时，变化条件不写--，会因为永远到不了结束条件而死循环
by zero_egg @ 2023-10-04 16:59:54
### 半年前的AC代码
```cpp
#include<bits/stdc++.h>
using namespace std;
int n;
struct water{
int id;
int s;
}a[1000010];
bool cmp(water a,water b){
return a.s>=b.s;
}
long long x=0;
int main(){
cin>>n;
for(int i=0;i<n;i++){
cin>>a[i].s;
a[i].id=i+1;
}
sort(a,a+n,cmp);
for(int i=0;i<n;i++){
x+=i*a[i].s;
printf("%d ",a[n-1-i].id);
}
printf("\n%.2lf",x/double(n));
return 0;
}
```
by zero_egg @ 2023-10-04 17:02:29
@[zero_egg](/user/615166) 谢谢，当时真的是睡完午觉跟个**一样
by li_zhi_a_wei @ 2023-10-04 21:57:16
@[吃蛋包饭的XNN](/user/536154) XIEXIE
by li_zhi_a_wei @ 2023-10-04 21:58:07