#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";
    }
} 
/**************************************************************
	Problem: 1357
	User: wangyiyang
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/