public static int solve(List V) { int n=V.size(),c=0; int x = 2*n/2*(n-n/2)*100000; Collections.sort(V);

for(int i=0;i<n-1;i++)
{
    if(V.get(i+1)-V.get(i) == 1)
    {
        c++;
        i++;
    }
}
if(V.get(n-1) - V.get(0) == 1)
    c++;
x+=c;
return x*2; 

}

}