#include<bits/stdc++.h> using namespace std; int n; int a[50],b[50],c[50]; bool cmp(int x,int y){ return x>y; } int main() { cin>>n; for(int i=1;i<=n;i++){ cin>>a[i]; b[i]=a[i]; c[i]=a[i]; } sort(b+1,b+n+1); sort(c+1,c+n+1,cmp); for(int i=1;i<=n;i++){ if(a[i]!=b[i]&&a[i]!=c[i]){ cout<<"No"; break; } } cout<<"Good"; return 0; }