AC
```cpp
#include<bits/stdc++.h>
using namespace std;
int a[10050];
int main()
{
int n,s=0;
scanf("%d",&n);
for(int i=1;i<=n;i++)
{
scanf("%d",&a[i]);
}
for(int j=n-1;j>=1;j--)
{
for(int i=1;i<=j;i++)
{
if(a[i]>a[i+1])
{
swap(a[i],a[i+1]);
s++;
}
}
}
printf("%d",s);
return 0;
}
by HEROBRINEH @ 2024-03-31 20:32:37
@[HEROBRINEH](/user/1113507) 谢谢
by ptsxlhs @ 2024-04-02 21:27:51