#include <iostream>
#include <cmath>
using namespace std;
int main() {
int n;
cout<<"unesi broj 1"<<endl;
cin>>n;
switch (n%4){
case 1:cout<<"i"<<endl;break;
case 2:cout<<"-1"<<endl;break;
case 3:cout<<"-i"<<endl;break;
case 4:cout<<"1"<<endl;break;
}
return 0;
}
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