#include
using namespace std;
int main() {
int n;
int a[n];
cin>>n;
int l=1;
int r=n;
int target=n;
for(int i=1;i<=n;i++){
cin>>a[i];
}
while(l<r){
jump:
if(l+r==target){
cout<<l<<" and "<<r<<endl;
l++;
r–;
}
else{
r–;
goto jump;
}
}
return 0;