AC码
```
#include <bits/stdc++.h>
using namespace std;
int main()
{
freopen("21310.in","r",stdin);
freopen("21310.out","w",stdout);
long a[10000],b,c=0;
cin>>b;
for(int i=1;i<=b;i++)
{
cin>>a[i];
}
for(int i=1;i<=b-1;i++)
{
for(int j=1;j<=b-i;j++)
{
if(a[j]>a[j+1])
{
swap(a[j],a[j+1]);c++;
}
}
}
cout<<c;
fclose(stdin);
fclose(stdout);
return 0;
}
```
by lorry26 @ 2023-07-04 16:52:07
@[lorry26](/user/931262) 谢谢大犇！！！
by 23_VS_24 @ 2023-07-05 08:56:58