vfd

#include <iostream>
using namespace std;
int main(){
long long n,i,j,ans=0;
cin >> n >> i >> j;
long long mn=min(i,min(j,min(n-i+1,n-j+1)));
const int a=n<<2,b=mn<<2;
if (i<=j){
ans=mn*(a-4-b)+10mn-a-3+i+j;
}else{
ans=mn(a-b)+(b>>1)+1-i-j;
}
cout<<ans<<endl;
return 0;
}

```cpp

```cpp