//\\__ hr1212 __//\\
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef pair<int,int> pii;
typedef map<int,int> mi;
#define si(a) scanf("%d",&a)
#define sii(a,b) scanf("%d %d",&a,&b)
#define siii(a,b,c) scanf("%d %d %d",&a,&b,&c)
#define pi(a) printf("%d\n",a)
#define nl printf("\n");
#define pb push_back
#define mp make_pair
#define all(c) (c).begin(),(c).end()
#define f(i,a,b) for(i=a;i<b;i++)
#define rf(i,a,b) for(i=a;i>=b;i--)
#define clr(x,a) memset(x,a,sizeof(x))
#define MAX 1000100
#define MOD 1000000007
int n,m,a[MAX],b[MAX];
int main(){
int r,k,i,c=0,x=0,y=0,j,t,l,z,x1=0,y1=0;
ll ans=0;string p;
while(si(n)!=EOF){
f(i,0,n)
si(a[i]);
clr(b,0);
f(i,0,n){
b[abs(a[i]-a[i+1])]=1;
}
c=0;
f(i,1,n){
if(!b[i])
c=1;
}
if(c)
cout<<"Not jolly";
else
cout<<"Jolly";
nl;
}
return 0;
}
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef pair<int,int> pii;
typedef map<int,int> mi;
#define si(a) scanf("%d",&a)
#define sii(a,b) scanf("%d %d",&a,&b)
#define siii(a,b,c) scanf("%d %d %d",&a,&b,&c)
#define pi(a) printf("%d\n",a)
#define nl printf("\n");
#define pb push_back
#define mp make_pair
#define all(c) (c).begin(),(c).end()
#define f(i,a,b) for(i=a;i<b;i++)
#define rf(i,a,b) for(i=a;i>=b;i--)
#define clr(x,a) memset(x,a,sizeof(x))
#define MAX 1000100
#define MOD 1000000007
int n,m,a[MAX],b[MAX];
int main(){
int r,k,i,c=0,x=0,y=0,j,t,l,z,x1=0,y1=0;
ll ans=0;string p;
while(si(n)!=EOF){
f(i,0,n)
si(a[i]);
clr(b,0);
f(i,0,n){
b[abs(a[i]-a[i+1])]=1;
}
c=0;
f(i,1,n){
if(!b[i])
c=1;
}
if(c)
cout<<"Not jolly";
else
cout<<"Jolly";
nl;
}
return 0;
}
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