for

#include<bits/stdc++.h>//submitRecord//
using namespace std;
//const int N=1e7+10;
int main(){
//freopen("","r",stdin);
//freopen("","w",stdout);
ios::sync_with_stdio();
cin.tie(nullptr);
cout.tie(nullptr);
int n;
cin>>n;
for(int i=1;i<=n/2;i++){
int a,b;
cin>>a>>b;
cout<<b<<" "<<a<<" ";
}
//fclose(stdin);
//fclose(stdout);
return 0;
}