#include<iostream> #include<cstdio> //scanf()\printf() #include<cstring> #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int a[10001]={0},k,n,x,b=0; cin>>k; for(int i=1;i<=k;i++){ cin>>n; for(int j=1;j<=n;j++){ cin>>a[j]; } x=1; for(int j=2;j<=n;j++){ if(a[j]==a[x]){ cout<<'N'<<endl; b=1; break; } x++; } if(b!=1){ cout<<'Y'<<endl; } } return 0; }