#include<bits/stdc++.h> using namespace std; int main(){ ios::sync_with_stdio(false);//优化,使cin与scanf相差无几 long long n,i,j,mi,ans=0; cin>>n>>i>>j; mi=min(i,min(j,min(n-i+1,n-j+1))); if(i<=j)ans=mi*(4*(n-1)-4mi)+10mi-4n-3+i+j; else ans=mi(4n-4mi)+2*mi+1-i-j;//模拟过程 cout<<ans;//输出ans return 0; }

```
#include<bits/stdc++.h>
using namespace std;
int main(){
    ios::sync_with_stdio(false);//优化,使cin与scanf相差无几
    long long n,i,j,mi,ans=0;
    cin>>n>>i>>j;
    mi=min(i,min(j,min(n-i+1,n-j+1)));
    if(i<=j)ans=mi*(4*(n-1)-4*mi)+10*mi-4*n-3+i+j;
    else ans=mi*(4*n-4*mi)+2*mi+1-i-j;//模拟过程
    cout<<ans;//输出ans
    return 0;
}

```

```