#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,i,a=0,d=0;
	int m[100],x[100];
	float s,g;
	cin>>n;
	for(i=0;i<n;i++){
		cin>>m[i];
	} 
	for(i=0;i<n;i++){
		cin>>x[i];
		a+=m[i];
	} 
	s=1.0*n/a;
	for(i=0;i<n;i++){
		d+=x[i]; 
		a+=(m[i]-s)*(m[i]-s);
	}
	s=1.0*n/d;
	for(i=0;i<n;i++){
		d+=(x[i]-s)*(x[i]-s);
	} 
	if(a<d){
		cout<<"jia";
	}else{
		cout<<"yi";
	}
	return 0;
} 
/**************************************************************
	Problem: 1357
	User: zzz
	Language: C++
	Result: Accepted
	Time:12 ms
	Memory:2072 kb
****************************************************************/